Why new physics may not be coming.

Mzh3000, on Jul 19 2012 - 01:43, said: "NOT COMING "SOON""
I forgot to put "soon" into my title.
Ok everyone already knows the server does the calculations, like when you fire or move.
Now currently all tanks are on a flat surface, theres no physics for bouncing around. If you side grind a tank sometimes it will freak out and the tanks will slide around.
Now if you had tanks flying off cliffs of not stuck to the ground, wouldnt that just be more for the server to process? And if so how much more would it take?