They need to fix spawning so that players spawn side by side and not in front or back causing blockades.
Need to add various things that should have been implemented 8 years ago such as vote to forfeit/kick/black list players to prevent queuing with them again/etc.
Spawning is actually a lot better, better than Halo which is hilarious, a lot better, it's just that people spawn really close in front or back causing blocking, fix this and best Spawn system since CoD4.
Maps in general suck, there's a few that are only good because they take after previous maps (i.e. Combine or w/e that resembles that one Boat level in BO2)
There's just too much, they tried to add as much detail as possible. Makes for very clutter areas that provide less support for a shooting game.
Maps are also very bland in layout and just aren't very well made. There's a few that okay though.
Specialists are actually fun once you learn them, adds a special aspect to the game. The Reaper's Scythe and the Firebreaks Purifier are very overpowered compared to the rest imo. The purifier not so much but it does have an OP factor, in charge up/usages/amount/range/etc, but the Scythe needs a heavy nerf. Just doesn't make sense when you compare it to something like the Seraph's pistol.
Lag/hit reg/etc is a thing still but that's CoD these days. On games that things fly smoothly, everything is great. I haven't played a CoD game since Black Ops 2 and I can say I'm enjoying the game now. The futuristic shit is annoying at first but anyone who has any bit of skill will adapt and learn to enjoy it.
CoD is a game meant to play with cocaine/mountain dew, not for slow people. This game punishes slower reacting people even more, so I enjoy that.
All in all it's fun for a CoD but Nuketown is the only map I can play for the most part. I'm in the middle of getting everything diamond, almost done. Once I finish though, I'll probably play a different game because the of the maps.