i Was thinking about some different buildings. 2 for human and 1 alien.
For the humans i was thinking about a "radioactive ammo depot". basicly poisons your ammunition and causes aliens to take damage. the only way to be cured is to visit OM or booster.This would be useful to stop aliens from camping outside base. Another human building would be a manable gun turret. it would be very powerful like a chaingun but more accurate. the catch is that it is useless unless someone mans it and costs alot of bp (16-12). It would also give 1 evo
For the alien i was thinking about hive
and how they kinda suck, then i thought of a new building. I was thinking of poison acids. these acids would cost 10 bp and do a little more damge but poison the enemy like a booster. this would be useful rather then the hive.
Give feed back plz 
Radioactive Ammo Depot:
It is a rather good idea for stopping the camping, but for smaller aliens (Mara, Basi, Dretch) this radioactiveness just takes away their ability to heal themselves.
This forces he larger aliens to bugger off back to their den for at least a small amount of time, while the smaller ones are at heightened risk.
Gun Turret:
This would be cool, as well as this, it would also be sadly overpowered, though, admittedly, the more I think of it, I start to reason that these 16 BPs are essentially useless if no-one is manning this turret, and that may be crucial in an alien rush, as every turret is valuable then, and yopu cant afford to have useless BPs.
However, my other side says that ths will lead the humans to building chokepoints, where nothing can break through.
So, ultimately, I think that this is a good idea, but shouldnt be implemented into the normal build menu.
Instead, in GTKRadient (Mapping Program) it would add degrees of single player and fortress defence to maps if you could spawn Manable Turrets that could not be rebuilt.
Map design is left to the discretio of the mapper.
Alien Building:
Im sorry, bu the hive is actually extremely deadly when used in conjunction with trappers, but without trappers and a good position, yes, they are as useless as an inflatable anchor. But then again, so it the acid tube, the trapper, machine guns, and all the rest. Basically, what Im saying is that it takes skill to utilize the full potential of these buildings, so get out and learn.
Ultimately, to help these projects go along, you can:
- Create good, informative concept art.
- Create Models
- Code stuff
- Think a lot about balance and write a informative guide to what needs to be done, and how this would balance.
- Suck up to someone who can to one of the above.