Currently up to level 18 with The Thing, noticed two things: Heroes are INCREDIBLY rare, so you really will be looking to pay for your hero from the roster (unless you're into one of the first 5, you may get lucky and get one sooner but i've had no heroes, no skins yet).
I'm enjoying the game perfectly fine but being limited to one hero so far is a bit daunting I will admit, it does put me off, I've got the scarlett witch aswell but you unlock her from a mission, so it's not really a drop ^_^. The gameplay is relatively smooth, can't say i've had any bugs hinder me which is good.
You can get massive FPS spikes on event bosses this mainly comes down to one of the options you need to turn down, basically it was 3 bars up out of 10 for me I think and it crippled me, honestly. I'm looking into subtitles on the movies / cut-scenes.
End-game content is daily missions, replayability with different heroes, similar to d3 on release, the same content repeated which is unfortunate but the side areas do change quite a bit from what i've noticed.
Overall i'd say a solid 6/10, but that's so far, (10hours gameplay in total). It'd be a much better game with more people you can party with, just like friends etc. But for soloplay felt the same as d3 a tad lackluster.
/Zelda