I am writing this post as I am not really happy with the current state of roulette.
It kind of confuses me how Level 50 and 60 content, potentially even 70 can rank itself into "High Level" Content (High Level Dungeons) when it straight up isn't.
For me personally, leveling has become a bit frustrating because I mostly get low-level content in Roulette (which takes roughly 2-2.5h to fully complete) hence why I'm making the suggestion of having a split roulette where you have 50/60/70 Dungeons and 80/90 Dungeons. Both give XP and tomes; if you do the first one it does not complete the other.
Both have to be rewarding enough to warrant queueing for it, especially the 50/60/70 one should be more lucrative than it's higher level counterpart (This can be done via XP adjustment and poetics adjustment I guess) to not kill queue-times for newer players.