S!
AFAIK to get a clean conf.ini is to delete it and then start the game so it creates a new one. Sure you need to adjust screen resolution etc, but other possibly tweaked settings should be gone.
The poor performance or stuttering or graphical glitches are not only AMD related. The "green team" has them as well. IL-2:CoD is the ONLY game of those I have installed with ANY kind of problems or glitches so it boils down to game code as well as drivers. For example I run World Of Tanks maxed out at my native 1920x1200 resolution without a single glitch.
Let's just wait a bit to the game getting patched and file those feedback forms to AMD to get driver updates. Did file today about the blue lines and flickering/stretching shadows. Do the same about CrossFire performance. The more hits they get the more likely we get a response. AMD does not read these forums
Anyways, gonna test a bit more later on and shall see how the next 3 patches or so will shape the game
