DICE's vaunted terrain deformation has always been something of a conjuring trick - Frostbite lacks the muscle to support total map destruction, and even if it did, map designers wouldn't make use of it because the result would be unscientific, unappetising carnage.
Well they made use of it in BF: Bad Company 2... every map was 99% destructible save for fence pylons and special structures (oil pipeline eg). In bf3 you can destroy... trees, oh and fences. About 5 walls in total too, most in Metros 'B' place in conquest. In short; it was colossally disappointing coming from BC2s 'Under fire? Make a crater! Need a door? Make one!' approach.
I need that coming back or I wont be, I'd love 64 players too, and a slowing of pace - more health too, or less damage. I've said before about the lack of tension generated in 3, it's far too fast paced to be fun, you can't plan an assualt if you die instantly constantly.