Support, it should be a donor feature because in the lobby it would be a cosmetic perk. The parkour is just for fun, so people can cheat it if they feel if its necessary. Fly hacks can be detected if the player doesn't have a colored name tag.
I guess, but a big map and something that disables flight in parkour would be needed. Flying in a small lobby like the one we have now is not rlly necessary.
Absolutely nothing unless you're bored. So what if people fly in parkour, there is absolutely no benefit for "cheating" in the lobby parkour with /fly....
Support as long as it gets disabled in the parkour area so that people can't abuse it to skip the parkour