Yeah but 99% of people aren’t going to install a 3rd party matchmaking client. The majority of people those attract on the PC side are those with pirated copies.
I imagine that once they realize how expensive it is to maintain a free matchmaking server farm and how big a hassle it is to frequently update the game they’ll go back to the old way. Until then I predict massive disappointment with the online aspect of this game for the PC.
I mean hell, even Halo2-Vista has a dedicated server.