skulk - +leap works only with two hives, but having one hive +movement can parasite while bite but with second hive up, now your +movement leaps (think of it as an upgrade/added ability with having more then one hive, but if second hive goes down, your back to parasite)

Gorg - this could be up for debate aswell. What is more important as a secondary attack. With one hive +movement can healspray? but that might means he can spit while healing himself? Dont think some might like this. For his +movement it could be webbing or bile bomb. Or leave gorg as it is without any changes.

lerk - this one is still up in the air. Either +movement will flap your wings, or spore. (maybe umbra+bite is too much) maybe once thrid hive goes up your +movement upgrades to primal scream from spore? what you think?

Fade - this one is a bit tricky. Personally I've leave this one as it is already. So personally speaking what +movement already does its more then needed.

Onos - With one hive +movment can act as devour, but with second hive up it can act as stomp and thrid hive it will upgrade to charge.

Note: once second or thrid hives goes down your +movement changes back, expect fades since +movement is only blink. Lerks still up for debate.

What do you think?

Having the single key change what it does with different hives would get confusing.

I thought the same but if you dont use +movement, your keys won't be effected really.

the way I think of it...with each gained hive aliens should expand their own abilities and easy usage commands.