Brave I got to 20 on my sorcerer earlier. It feels like the skills are just starting to open up and more interesting gear is starting to drop. I was a little disappointed initially that many of the skills were pretty much the same as the D3 wizard but there does seem to be a decent amount of scope for customisation by the looks of it.
I’ll probably be on this evening (queues permitting) if you fancy trying a bit of co-op.