Would a No Major Skips category (No OoB) Be possible at the current moment?

Yeah sure! We would have to define though what major skips would be. As you said, OOB makes sense. But what about physics jumps that are in-bounds?

I think those would be fine as long as they don't skip major objectives (Admittingly, it's been a while since I've played, but I wouldn't mind trying to speedrun it sometime!)

For a "No major glitches" category I would guess:

• no OOB (solid ground allowed, no void)
• no physics jumps

• grenade jumps allowed
• movement tech allowed
• reversing time on objects allowed (surfing back in time), but no boost that sends you flying
• skipping objectives allowed

"No major skips" would be even more restrictive. So you want a category that goes through every objective of the levels or can some be skipped? There are some levels where you can skip most of the level without going out of bounds by jumping over some fences.

Yeah, but honestly I can see a legit case where both are categories (No major glitches, and No major skips)