Multiplayer shooters have fallen further than most other genres. Time has really taken its toll on it. We talked about it to some degree in this article which compares many past games to present day counterparts. It was also mentioned in this article. But we felt this specific subject deserves its own article because so much has been taken away from this genre.
There are of course exceptions to the rule. Valve, Tripwire Interactive, Bohemia Interactive, and others preserve the greatness and the flexibility provided by older PC exclusive multiplayer shooters. But these exceptions are rare. In general this genre, along with RPGs, have been watered down so much that it really is baffling and depressing.