Cod Elite
It fragmented an already fragmented player base. Buying map packs that automatically blended into the normal playlists was great. Getting a new map (if we're lucky) and then having to wait over a month before it gets out of the failure that is the Elite Playlist is the most frustrating thing to me. (Dont moshpit TDM/ Dom/ KC. I would rather eat a dog than play Kill Confirmed. Put TDM/KC and Dom/Dem. Or does that make too much sense grouping like-minded game types together?
Also Face Off. I love the maps. But I'm also in the camp that says put 6v6 on it. All the maps are bigger than shipment and I believe only one is smaller than Rust. I love small maps, if you don't then vote for the giant shit maps (bakaara/ liberation/ that snow map I can't be bothered to remember). Speaking of voting for maps.
Give us a third map option of "Random". Or you know, just keep ignoring the simple progressions that Treyarch makes (like flags in domination disappearing when you are near them so the flags dont obscure your vision... oh and having a scoreboard that reflects the game type, not just Kills and Deaths.)
Maps are teh same ratio of good to bad as every other COD I've played (about 60% good, 40% bad. DLC Is always much higher rated IMO, Raven knows how to design maps)
Guns are... well fine. I hate a couple but scrubs need help too. I'll never make a class with the type95 out of personal pride, but if you want to use the ugliest easiest gun in the game, go right ahead. When you make guns suck you get black ops (I actually love black ops, but its downfall is awkward limited weapon selection)