Exp from level 50 dungeons - Timetable?

[Musashidon]

Which is dumb, why would I run a roulette if it costs me more time and give less reward while it is supposed to be an incentive to help others players and only available once a day ?

then the roulette is not meant for you, like i said it's not suppose to be better. it's for players who are just after exp and not lvling in the most efficient way.

Do people not understand that the DEV Team can just decrease EXP earned once you hit 53/54 so level 50 dungeons are viable anymore?

has nothing to do with this, then SE would just nerf exp once you hit lvl 50 (because they stated they wanted you to lvl with the new dungeons) like crafter leves.