Traits that negatively affect movement shouldn't apply when in a wheelchair.

[JORJ949]

Traits that severely affect movement (ie, trippy, two left feet, etc) shouldn't apply when using a wheelchair, since you're not using your legs.

They don't, I have trippy on my legless wheelchair character and while there's the chat message for "Etienne Khouri trips!" you don't actually fall out of your chair and drop what you're holding. I have this trait such that if I end up with legs (cloning, other things) that I'm still impacted in my movement.