I am confused about the devs' position on backing opinions up with experience.
There are very
specific instructions regarding making comments without having experience.
When 3.0 came out, we all saw many threads that said "you can't judge this until you've played it a bit...get some experience with it before commenting".
Competitive players often attempt to discount another player's opinion due to his lack of experience.
The stickied "FYI - backseat modding" thread in the competitive forums indicates that voicing one's concern about a player's lack of experience is a poor course of action because it is the moderator's job to deal with this, not Johnny Forumgoer's.
Whenever the issue comes up in a thread, however, the devs state that we should not exclude opinions based solely on experience, but rather examine the logic of their claims (examples
here,
here, and
here).
The stated reason in the stickied post seems to differ from the reason put forth by the devs and mods in the actual threads.
Which is, I assume, why the moderators refuted all of the players' concerns about 3.0f instead of just saying clanners are too dumb to adapt and locking threads

I am not sure how the situations differ here. I see a few possibilities:
the moderators locking 3.0 threads for the first three weeks disagree with the devs in the competitive forums (unlikely)
filtering by experience with clan play is different from filtering by experience with a new version (true, but doesn't justify the different positions---clanplay is more different from pubs than new versions are from each other)
the devs can filter by experience but other people cannot (possibly--the devs potentially have to deal with more posts, so they are justified in using more callous filters)
<insert reason here>
I apologize in advance if this starts sounding like a lecture on debating, but I think some things need to be said out loud, as it were.
I am of the opinion that experience is extremely important when discussing the balance of a game. Do we really need a logical argument to explain why a cat-pack knife rush won't work even though a catted marine can knife skulks down in no time flat?
As (I hope) everyone is aware, most debates (on the ns.com forums, with friends, in politics, or wherever) come down to people having a side they want to be on and finding arguments that fit their opinion. Argument as the act of reaching an opinion on a subject is rare. Logical argument has long been generally dismissed. If one considered all logical arguments put forth, one would spend his entire life trying to form opinions on even one controversial political subject. In the end, many such matters come down to beliefs and opinions that cannot be backed up by logic, but are merely the result of experience. Experience trumps logic, almost every time. How many people know how to resolve Zeno's paradox? How many people have ever lost sleep over the knowledge that Achilles can never catch the tortoise, even though he is faster? The logic of Zeno's paradox is very compelling to one inexperienced with calculus, but everyone that hears it is able to think "oh, that's a neat trick of logic" and then ignore it in favor of their experience that faster things do, indeed, outrun slower things.
And, indeed, most arguments are very biased. Sure, they will sound logical, but they will be the result of a player wanting to make a point and carefully picking data out from his experience, and forming conclusions that back his opinion.
Who has never neglected to mention a strong counter-argument to their argument because they had no answer for it and did not want to hurt their point? Even if you have never done so (and I find this unlikely, unless you rarely try to argue), I bet it is easy for you to imagine this happening frequently.
To try to bring this back 'round to something vaguely resembling on-topic:
There is no such thing as a purely logical argument about real-world things (that is, things that cannot be described by formal languages). When one is reading an argument by another, one takes into account all of his perceived biases of the poster, and evaluates how well the post resonates with his own experience and opinions.
When one sees, say, NGE's 17(or however many)-page post about 3.0f chambers, there are a few likely immediate reactions:
"oh, he's just a clanner/whiner who is upset that he has to relearn the game"
"finally, someone explaining in detail what the devs have F'ed up this time!"
"let's see what other people think about the chambers!"
I bet that anyone who reads the forums regularly had a decent idea of what would be included in the post before they opened it.
SImilarly, if there were to be a post titled "unbeatable electrification strat", most people would have an opinion on it before reading it.
I am not trying to accuse anyone of being particularly biased here. I am just saying that everyone does it, it is human nature, and it is generally useful.
I am making this claim because it is absurd to expect any reasonable amount of discussion about a game to exist in purely logical terms. It always boils down to experience.
"we should remove siege damage to players because it is no fun to spawn and die right away." You will not buy this argument unless you have died to sieges or had bad times with spawn camping.
"pings need to be more accessible, as marines are getting owned by cloaking". Again, you need to have played a decent number of games and seen the effects of cloaking to buy into this. Someone could go on for pages about how a lone cloaked skulk can take out a marine of a group of any size 99% of the time, and how that makes it impossible for marines to advance, but you are not going to agree with the post unless you have played and seen it in action.
"we should balance the game around skulk upgrades being free, because it's more fun that way". Yes, you could say this sounds logical. It still depends on experience, though. A refutation of this argument would have to either say "no, it's not more fun", or "it's not possible to balance it like that". The former can be based only on experience, and the latter seems unlikely to be true in the first place, and, if it is true, impossible to actually argue logically.
That's all I have for now for this point:
experience is, indeed, important in arguments of any type
I hope that this has been informative, or at least not offensive, to those who started reading with a thought other than "not another whiny clanner", "yay Dirm tell it like it is", or "oh god, why hasn't he been banned yet?"