The 2 alternatives I can think of off the bat are the baron in strat and the lycerum (sp?) in BRD. I ran my daughter through BRD last week and spent some time in there and she was getting XP fairly fast. There is no boss to dodge and is easy to reset. There are some ranged mobs you would need to run around and LOS to you. The downside to both of these is that they are a huge PITA to get to. Especially with toons on the low end of the instance's level range.

I also do not know if they have also been nerfed, it would make sense.