The fact that you've mentioned HDR at all, Mike shows clearly that you have not bothered to read up on the situation or the technology involved. Yes, it IS in fact impossible to perform MSAA with deferred lighting. HDR doesn't even enter into the discussion as it has nothing to do with anything.
Since you didn't bother to read before you bitched last time, I doubt you'll bother to read now, but hey I'll at least ante up with the proof.
http://download.nvidia.com/developer/presentations/GDC_2004/D3DTutorial_Sim.pdfNow considering that and also considering how deeply embedded the deferred lighting/shading is in the GRAW engine, if you actually expect them to re-engineer the entire thing, remove the deferred lighting/shading and rewrite with an entirely different form of lighting just so that you can have a form of AA that you are used to, then you sir are a moron. Then again, if you have a few hundred thousand dollars to fund that venture, by all means contact UBI about it.
Lesson of the day? Learn what the fuck you're talking about before you open your mouth.