I have never queued for a low level roulette on a level 50 class and never will unless the rewards for doing so are incredibly high. For me, the biggest issue is that it is just so incredibly boring due to all my skills getting removed on top of being stuck in the dungeon for a fairly long time.

They could help the boring factor by giving skills a pass and flagging some as not being level synced away so that you can at least keep your core combo when level syncing down, as well as reducing the number of mobs while increasing the xp so that the dungeons can be done a bit quicker.