Then why do I find BF:BC2's positioning to be so terrible and inaccurate no matter what combination of audio settings I use between the game itself, Windows, and the X-Fi drivers? The sound samples themselves are good, but it's extremely difficult to figure out where they're coming from, and close analysis of the grenade explosion sound effect revealed a canned stereo pan regardless of what direction the explosion is coming from.
It was a big step back from the Refractor engine titles (BF1942, BF:Vietnam, BF2, BF2142), but those just used DS3D or OpenAL like everything else at the time.
Again, I just don't get it, because PlanetSide 2 at least has par for the course software audio mixing. I can tell where sounds are coming from with relative ease. That never happens with BF:BC2.
BF3 may be different, but I'm not holding my breath that they suddenly fixed the audio mixer for Frostbite 2.0. I'll find out soon enough...it's already June 13 here, but the Origin store hasn't updated yet.
Oh, and if PlanetSide 2's going to run on the PS4, then they'd better make sure the framerate doesn't dip below 20 FPS every time you take part in the middle of a really big fight, like at The Crown. The current PC client wants your CPU cycles, all of them, and a 3.0 GHz Q6600 isn't enough. If the forums are any indication, even the latest Ivy Bridge and Haswell i5/i7s at over 4 GHz struggle just as hard. It's arguably more demanding than Crysis.
There are stark differences in positional audio between BC2 and BF3. Sounds like you just need to try it for yourself and decide. You may find no difference. I don't know.
You're right on PS2 being on PS4. I would like to think that since they are porting the game to a predictable environment (not better, but at least predictable), they can take care of some of the framerate issues that plague your major siege points like The Crown.