I'm in the same boat with a base Rev. 1 Xbox One. Load times aren't bad, but One X is MUCH faster...

So, I noticed there were no rules, and I thought I'd pitch some out there... Maybe they are decent enough... Timer starts the second you hit start, and the game begins to load the first cutscene.

Timer ends once the "trinity" command is activated (since the final boss ends with that command..)

DLC Keyblades (Phantom Green, Midnight Blue, Dawn Till Dusk, Starlight) are allowed.

I believe these are a good starting point for rules...