Ah... I don't know about Multiplayer... the thing is. if that game is not a free-to-play that depends on microtransactions only to pay for its server (I don't like these as)... they need other ways to get money from players to pay the server cost...

a 'Must Have' DLC may be a problem but for online game it can be the best possible option.

Many Online games servers shut-down because the Company developed it can't maintain the server with the little money they get anymore... will you rather pay of a DLC? or watch the game you love die?

well, that's what I think....