Interesting, although that’s not the issue as far as the official profile is concerned that will be included in the next vorpX version as that doesn’t have any gamepad override enabled in the first place. From the looks of it I’m 99% certain that the jitter in question is rooted in the graphics pipeline and not related to input.
I’ll take a closer look at Reach later. A similar issue occurs with most recent Call of Duty games, which also behave rather special, so it would be useful to finally get to the bottom of this anyway.