From what I have read, I suppose I am one of the lucky ones.
I have only crashed a couple of times, and have been able to recover from them.
Usually the crashes occur when I am in a menu, or at the wartable.
Other UI responsiveness bugs occur as well, but if I alt-tab back and forth with the application, they tend to fix themselves.
I use WASD for movement, and F to interact, and R to swing my weapon. Which all seems to work fine with a little adaptation.
The ability to toggle mouselook instead of holding down the right mouse button would be a godsend though. (Can't stress that enough)
My sympathy goes to those that cannot play this amazing game, I feel that it was well worth the purchase aside from the minor complaints listed above.
I hope that BioWare develops a fix soon, but you must realize the sheer amount of hardware and software combinations that exist in the wild.
I know little about application development, and it sounds like a massive task to debug.
Good luck! Thank you for the update.