Some new official info from ubi forums

[CharveL]

Originally Posted by Tree_UK

So I guess on the 128 player servers we have to make sure only 20 people take a bomber. Otherwise its going to stutter like the King. Im not overly concerned in truth, they did the best they could with an old game engine, it could run a little better if they ever do fix DX11. At least now we know why they kept IL2 in the title because it will appear like a small upgrade to the original.
Maybe they might reduce the price of the initial title by 50% seeing as we are only getting half the game.

Just so you know, or maybe forgot from the other thread, DX11 won't necessarily make the game faster anway - just prettier - when your bottleneck will be the CPU crunching all those planes and objects. It does have the potential to speed things up for simple objects like, say, terrain or water by using tesselation but you can't use it very easily for detailed objects like planes.