Bungie is, only two weeks in, already making tweaks and refinements to the multiplayer experience. This first matchmaking update isn't a doozy, but it does address some small concerns with online play that have been brought up since launch, as well as a few goodies thrown in for good measure.
The update reduces the appearance of Shotty Snipers in Team Matchmaking (which was appearing at an unusually high frequency), and fixes it so that when players veto it, the replacement for Shotty Snipers will not be Shotty Snipers. Slayer gametypes will also appear more frequently in Lone Wolves. Big Team Battles have been upped to 16 players, and attacking teams in VIP matches get a waypoint to assist them.
Apologies in advance to the non-Halo players, for which none of the above will make any sense.