Yeah I've been trying to solve an issue with Walk-O-Motion where framerate affects speed, that includes the head tracking, therefore the jump speed.
This is now fixed but a lot of Walk-O-Motion was redone.
Right now I'm working on this Mario project, and I'd love to do more Sonic, with much more reliable mechanics but I need to start spending more time on my own projects, and time is something I don't have much of.
The tilting problem is sort of native to Sonic mechanics, mine are not too good, I could definitely do much better now anyways.
I'm unlikely to update this right now, I don't have a Vive, and Oculus is set up a bit awkward in SteamVR so my tests are completely pointless.
Once I get a Vive and a bit of time, I'm going through these older projects and getting them fixed up.