Basic Idea: If the Aliens build and finish a second hive, the mainhive becomes a lvl. 2 hive.
Also if the third hive is finished, the mainhive (at lvl. 2) hive now is becoming a lvl. 3 hive ([not so sure about this] and the second built (lvl. 1) hive a lvl. 2 hive).
A level of a hive is equal to aliens spawning slots available at that particular hive.
Which means, if the second hive is up and marines kill the second hive, aliens will still have two slots to spawn at their mainhive.
But if marines kill the mainhive (lvl. 2) instead the aliens will only have a lvl 1 hive and so they just got one spawning slot left.
That does not mean that aliens get more then a maximum of three spawns at a time, like it is now.
This is just a suggestion to have some middle game balancing.
It may sound a bit confusing, allthough my english is not that good (and i should reeeeally go to bed now ^^), i hope you still get the idea behind this.
Nowadays a standard NS game gets to a point where the game is decided while it will still go on for some time.
Normally this happens when either the aliens lose their second hive or they do not.
If the aliens lose their second hive, they do not only lose an ability, they also lose a slot to spawn in their spawning queue. This leads to a highly imbalanced and frustrating game aliens most often fight one on one against an uber strong marine.
some scenarios to make things clear:
main hive lvl1 - 1 slot to spawn
main hive lvl2 - 2 slots to spawn
( second hive killed )
main hive lvl3 - 3 slots to spawn
( second and third hive killed )
main hive lvl2 - 1 slot to spawn
+ second hive lvl 1 - 1 slot to spawn
main hive lvl3 - 1 slot to spawn
+ second hive lvl2 - 1 slot to spawn
+ third hive lvl1 - 1 slot to spawn
( main hive killed )
second hive lvl2 - 2 slots to spawn
+ third hive lvl1 - 1 slot to spawn
main hive lvl3 - 2 slots to spawn
( second hive killed )
+ third hive lvl1 - 1 slot so spawn
I really can not say if aliens should have three slots remaining if their third hive is killed as this would be harder for marines again, but in my opinion the second hive gameplay climax is a bit too heavy and not easy to cope with. As an alien it is just boring to play on just to be fair, but you know that you aint got no chance.
gn8