I dont see an issue with it being a single segment run, however single segment runs and segmented runs are different so we will have to make a new category for it

You let the timer keep running. Timers do not pause during RTA runs

i prefer RTA speedruns personally, although i run on a slower console

A friend of mine and I have done a few runs in Co-op mode and we were wondering if we are allowed to submit them. Would you be considering making a Co-op Category leaderboard?

Could you define rules about when time starts and stops?

If there are any other runners out there that wish to add a category simply submit it here along with a list of rules for the run.