This idea just suddenly appeared to me ( I haven't thought about cons so tell me if there is something really wrong in my idea

). I was thinking that all alien building are organic, so why couldn't they evolve too.
For example when aliens reach s2, all buildings start to upgrade. It would last for like 5 mins and every building build after that would do the same. It would just change the abilities, so we don't need extra modelling. Barricades would gain more health, ability to let big aliens through and maybe an attack at s3, eggs would gain higher spawns rate and HP, and maybe some buildings would become invisible to human radar ( booster and tubes for example, not eggs, that would be so unfair for egghunt :roll: ).
There could also be other ways to evolve them. Those dedicated grangers gain evolve points during the game, so they could use sacrifice their own points to evolve buildings and maybe some upgrades could only be bought by using evoluion points. I don't know if this idea works in game ( or makes it unbalanced? ) but it would bring more strategy to using evolution points.
Maybe the same could be done with human base building....like buying software upgrades or something

, for example you couldn't buy pulse rifle at s2 before you had bought an upgrade to armory.
