I don't see why they couldn't have had both. I think substituting Matchmaking for a server browser is shit. However, having both Matchmaking AND a server browser is perfect.

They should have used matchmaking for the official levels and ranks, and made the server browsers for casual games. You need to earn your rank through IWnet, but you can have fun like now in all the dedis.

But they probably saw through that because Activision is too dumb and greedy to support the community and platform that even made the game a success. Had it not been for the PC gamers, it wouldn't have made it to Call of Duty 2. Fuck you Activision.