Not gonna happen. Roulettes primarily exist to fill up parties for people who are queuing for existing content. EXP and tome rewards are merely an incentive for us to run roulettes and thus help these players clear, not the main goal.

A roulette like this wouldn't serve to help with this at all - in fact if the rewards were good, it would take people away from the "useful" ones - and on top of that, would require dev work in order to re-scale every single dungeon for max level each expansion. Not to mention, we'd still steamroll these dungeons with gear unless they'd either sync down to min ilvl per expansion - which people would likely complain about, since the purpose is to sync up - or devs would need to re-scale everything each tier, which is even more work.

However, for variety I'd be all for removing the current "max level" roulette and giving its rewards to the 50/60/70(heck, boost them even, this roulette really needs more traffic), while keeping all current max-level dungeons in Expert for the whole expansion, so it's not just 2 dungeons over and over.