As for runtime debate, a Marvel movie which wasn’t even an MCU movie just under 4 years ago, had a runtime just under 2 hrs and had damn good pacing and time to flesh out the central characters. Said movie was also easily the best Marvel movie. I’m pro-shorter runtimes so long as it works, I don’t why Thor or tbh a wide majority of CBMs couldn’t do just under 2 hours runtime so long as the narrative fits and there’s no reason to suggest why it can’t for this one. MoM’s problem wasn’t that it needed a longer runtime for multiverse rules but rather they absorbed a bit too much of the runtime and made parts drag.