More thoughts:
TA could easily be either fastest normal run (Allowing Time Travel), fastest TA only (current), or fastest per starting time period... I do like the starting-time-period version because it wouldn't invalidate current TA status (They'd count for "Present"), and it'd open up competition in the other 2/3 of the game.
For rings, All-area normal-game RA gets the highest ring counts, so that's what we should use. By-time-zone could be used, but it seems arbitrarily restrictive without providing much more in the way of challenge. If console players don't like it, they have a computer to play with, because they can jump on TSC, so it's a choice to not compete, and that's not something we reflect in our charts (That people are unwilling to play X or Y... otherwise we wouldn't have S06 charts >__>).
Scores... For scores, each time period could have a different score, and it could be higher/lower than the full-run score (I don't think are enough rings to offset the time bonus in any level, feel free to correct me). I think allowing all start points (from L Select and/or TA) and normal game play as score routes and only having a single score slot would probably be best, similar to KC's "Use whatever time you want" ruling. Gives highest scores and lets each player do what's best/easiest for them, or what's best for score. I don't think RA and SA are the same for many levels, so I think whichever start gets you to the end the fastest and thus allows for more time to combo/ring/etc would wind up being the biggest, but I'd love to be wrong.
tl;dr: This is roughly what I want:
Times:
PP1 Past
PP1 Present
PP1 BFuture
PP1 GFuture
Rings:
PP1 (allows normal gameplay, ta, or different start, whichever is best)
Scores:
PP1 (allows normal gameplay, ta, or different start, whichever is best)