I don’t think Variant Dungeon Roulette would work that well with the “speedrun to the end” player culture we have, but I’m personally patient with folks who are exploring. So for myself I would queue for it and let the other players set the pace. As for your other suggestions, I have no opinion on PvP, but I LOUDLY endorse folding the Crystal Tower raids into MSQ roulette. It’s so, so tiresome to keep getting them.