I love it. I think it's a fun FPS that sort of combines TF2 and a MOBA. I think the tongue-in-cheek approach they're taking to certain characters is great, and I'm assuming this will be an awesome stepping stone into a new IP/universe.
The one thing I think they should change is the ability to have multiple of the same character on a team. I saw one game with 6 Reinhardts on one side, and nothing could kill them. Balancing for that would be such a huge pain.
Currently Working On: Myself
One time, we ended up with 3 Widow-Makers on our team. The other team never even got to leave their spawning building... 2 of the opponents had 0 points at the end of the game. It was sad.
I hope they'll provide players with a Map Editor. There were definitely too few maps.
I'm sure there will be many more maps by the time this thing hits beta. It would be silly for there not to be.
Currently Working On: Myself
NudeRaider -- blessed innocent soul knows nothing of the strife we had before EUDs were discovered 
DarkenedFantasies -- Probably just didn't care. For example, at some point before release, they've updated the graphics of some of the Protoss buildings (Forge, CyberCore, Citadel, Observatory, Arbiter Tribunal), but instead of properly re-rendering them with edited 3D models, they did crappy copy-paste jobs on the rendered graphics.
