This is my experience as well. I am so sick of Satasha and to a lesser extent Tam Tara. So, how it seems to work is the higher lvl the dungeon, the more XP the mobs will reward you (this is after you do your daily roulette). Just testing it real quick last night, at lvl 28ish in Haukke Manor I was receiving about 1600 xp per normal mob and near 2k for maidens or other "boss" types. Use roulette, get stuck in Satasha, and get about 500 xp per mob. Nope, not doing that again. What you have to do is queue for the dungeon nearest your lvl to receive the best xp. Now, if you get stuck with a primadonna tank or healer (I'm dps), the run can kinda drag on. Also, there are some tank bots running around that just need to be kicked. You can tell they are a bot by their actions and pathing.

What I have taken to doing now is queueing up for a dungeon, and in the meantime grinding fates....solo. You can't bring out your damn choco or you get kicked out still....learned that one the hard way -_-;; Also, you can't join a fate group to get the chain xp (if any) or just better xp from tagging all the mobs because you can't be in the dungeon queue at the same time. So, now I am starting to see more and more people solo fate and the groups have consistently gotten larger since the patch. There are some fate groups about now too. Hell, Cancer is being killed again, which is just amazing and awesome. Costa Del Sol was absolutely dead for the past week but seems to have increased in population today. Anyway, grind fates solo and queue for the dungeon that is nearest your level. You can do levees too, but those are still best used for crafting/gathering, or when you are real close to leveling out. I just can't bring myself to using 10+ levees in a row to gain 1 level.