I know you're not a fan of H3 anyway but I'm seeing the sensitivity complaint across various boards and threads. Overall, the port of Halo 3 as it stands has done a bit of a disservice to that game. Yes, It's beautiful at 60 FPS, 1080p, however, there are three glaring issues with its current state:
1) The audio mixing. The most grievous of the issues, wearing a headset sounds like a cement mixer of weapon audio, misplaced footsteps and background noise. Was moving me to nausea on Narrows earlier. Simply must be fixed.
2) The maps and settings. Radar Jammers? flares? Shield doors and attics? What were you thinking, 343? Plus, needs some sort of pro variant (MLG settings by another name) where radar is off, movement is 110, damage is 110 etc
3) The sensitivity congruence between H3 and the other games. The default sens of 3 feels roughly the same in CE, 2, 2:A and 4. In H3 it feels like Vaseline under the sticks. I lowered it to 2 and it feels about the same as 3 sens in the original H3. Low priority but they ought to readjust the sens ratings so 2 is 3 etc. stuff like that could put off newcomers to the game. I've already seen so many people saying they can't aim in H3 because of the sens. I'm sure there's deadzone issues too.