Solo in any type of MOBA game is pretty miserable though. I don't think it's a trait unique to Heroes. You feel it more in Heroes right now because the player base is new *and* there's not a whole lot of high MMR players doing solo queue. Multiply the player base out 50x to 100x, and put in a proper ranked mode (ie: solo only) for solo queue, and I think a lot of the issues people have with solo queue disappear.I think the issue Heroes has is that a lot of depth in premades will not get you a popular game. The vast majority of your playerbase (95%?) will not be doing premade 5's.
Your average player isn't going to know how to play the game well until there's a ton of resources out there for them to follow. That alone is going to torpedo the quality of your games.