Hmm, so if I want to play a co-op game versus bots with random internet people, what's the quickest way to do it? I mean I could just dive into matchmaking games and not worry about terrible stats, but since it's tied to my Steam account forever I would feel a little embarrassed. =PThe Center hero key right now is hard coded to be your select hero key pushed twice. Simply bind select hero to space, then all you have to do is tap space a second time, and it will work just like LOL.
Also, tab is used to change between units you can control, if you have more then on. The scoreboard isn't really that important, since it doesn't show stuff like items and creep score, it only shows K/D/A.
Also, Valve just hasn't updated the Practice Lobby stuff at all. A month ago, there wasn't even 5 open practice games at once, so it wasn't a problem. Right now, the list only shows 5 lobbies at once, so if you want to get into a game you more or less have to use the password options.
As for select hero, spacebar doubletap already seems to do that...unless you mean a tracking button? I mean I wanted functionality like holding spacebar in LoL, where it temporarily makes the camera follow you as you're running. Or at minimum, a single tap option. *shrug*