As I posted in another thread there seems to be a compiler problem with the settings for memory management which limits the usage to 2GB. I do not know if this is intentional but it reduces the ability to preload content (which is to prevent sudden stuttering from hdd-loads). Adding DX11 support is no big deal (just a few code "Find and replace" actions) but that won't optimize anything. They would have to rewrite things like AO, DoF, Physics, etc. which is alot of work if you didn't write the original code. These optimizations will be useless for the PS3 version.