Q u o t e: you will no longer be able to choose games.
it will be sc2 style, randomized games only.
I hope it won't be exactly like that either. It is nice to be able to pick and choose which types of games you want to join. If I had to choose between the 'Dungeon Finder' from WoW and the 'Match Finder' from SC2, I'd rather have the Dungeon Finder style with at least SOME options (areas etc).
I actually didn't like how in D2, once you passed NL or NM, you couldn't view the games from the previous difficulty. People just made new characters and looked up games, then logged out and logged back in with their other characters anyway, and I'm sure constantly flooding the servers with character data over and over just to circumvent a dumb limitation in the first place, was worse than allowing people to just choose NL, NM or HELL listings.