If you absolutely love these types of games, or you're really, really eager for something new, then it's still worth checking out, especially since it's only $20 USD. If you're a little more hesitant, I'd wait, at least until some of these issues are possibly fixed in a patch. Afterparty is included in Xbox Game Pass, so if you intend to play on Xbox, you do have another option.
Modern Warfare is an excellent addition to the Call of Duty franchise. The story felt like a serialized TV show, and most of the multiplayer action is fun. There are few places where the game falls, but not enough for me not to recommend it.