Wow!
So mani ideas all of a sudden. lol.
So in summary so far, can i propose: (Of course subject to review and adaptation and etc etc)
1) Have base where doors are implemented. Humans can open em auto. Aliens have to blast em down. This is known as security lockdown.
2) We might have to consider remodeling items in the rooms to define inert objects, and 'damageable' objects' which has an "HP" attached to em..... This can be repaired for most cases, for time / money.
3) We can consider leaving antimatter alone - its SUPER HIGHLY secured, and cannot be damaged in any way?
4) Re: Power Plants, our initial discussion starter - I am proposing this be like any other 'non-inert' objects, damageable, and must be fully repaired if damaged, for base to be functional again.
Then again, we wanna focus on the current 2.3 branch's priorities first, and consider these for 2.4, if its too difficult, esp the remodeling part - the graphics team always find such ideas a nightmare. lol.
Oh yes, one last thing, i know this is not yet on the drawing board - are we considering bombs - like the ones in xcom - where it can be proximity / timed. It simply blows down doors or *aliens / humans* alike, this can come in helpful in future missions AND base take down.
For all we know, it would be a reverse situation - we are STOMPING DOWN THOSE ALIENS' Butts in their holes! Whoeeoeooeoeoeoeeeeeeeeeeee!