The issue the original post was about has been addressed in vorpX 21.1.1. If you still encounter stutter with headset sync set to ‘Fast’ in a game, check whether either enabling FluidSync or setting headset sync to ‘Safe’ helps.
Some headsets as well as some games may work worse than others with uneven game FPS to headset FPS ratios. In such cases FluidSync usually does the trick. Headset sync ‘Safe’ can also be useful, especially in cases where the GPU is completely overloaded. Costs FPS, but gives the GPU some leeway.
No problem here with key combos for EdgePeek. Just in case you didn’t do that already, maybe try a different one.