THIS ^^^ would be brilliant.
Excluding this past week, we (Phoenix) have put together a group most nights, and apart from maybe 3 occasions, it is just us VS So'Low/Zharina etc. And even with your crazy combos you still own us. Once you took our Scoundrel Hoarus with you and he gave us feedback we realized the big difference between how our teams play (and why you own us). So more opportunities like that, to mix groups and learn would be wicked.
Balanced ranked would also be cool cause we could play toons we otherwise wouldn't cause they aren't as strong (I love my Sage Healer but feel guilty taking her into Arena). We used to organize 16men for 8v8 Balanced, so why not organize 8 men (or 16, whoooooo) now? Everyone /cjoin harbingerranked and shout out when you wanna play. A few of us use it already, a couple more and we'll be set.