There is a technique called "Infinite Spin" which allows Mario to gain theoretical infinite height. This technique is used heavily throughout this run to clear what would seem like impossible-to-clear vertical stages.
It is possible to complete T2 without fludds, yes. But it takes a long while to do so.
There could be a solution to this but its very hard to do, and that is to ask Mineplex builders that built the map (Dean) if they could give us the map and the minigame so that once they remove it from the server we can still play it and speedrun it, altough that is very unlikely.
Yes, that would make the most sense (to remove it once the event is over).
Can you please add Halloween Havoc as a category? Me and my friends tried to speedrun it and we got pretty close to the world record, it would be hella cool to have a leaderboard for it.