The campaign was whatever, sort of short and ends with a weird cliffhanger. Hopefully a DLC (free) expansion comes out.
There already is more DLC coming out, so I expect more DLC in the future.

Maps: There are a few more maps in Warzone than in Team Deathmatch (which is weird),
but makes sense since the maps can be insanely large.

Weapons: The weapons seem balanced, but my biggest rant is about shotgun whores and people who use LMGs just to spray the crap out of you without any real skill.

The Engineer has two LMGs and one SMG. Worst weapon class out of the classes in my opinion.
Setting up turrets is nice and hacking enemy turrets is also pretty neat.
But the LMGs are just stupid. Just walk in front of someone and spray the crap out of them (especially the second one you unlock).
So many people do that, cause they have no real skill in anything... Same with shotguns.

The Sniper is a pretty balanced class. You can have the semi-score rifle or the real sniper rifle which I occasionally use more often.
I HATE environmental blockage in this game, it's stupid.
Cloaking is really useful and neat, and the secondaries are probably the most balanced and handy.
The silenced machine pistol keeps your cloak after killing people passing by and it's fairly accurate.

Also no scoping at point blank range since you have a weak secondary should be improved a bit.
Whenever I do it, the crosshairs would be dead center on my enemy, yet it totally misses... -__-"

The Tactician is your usual assault rifle class, brother of the Infiltrator I call it.
I've started using it a bit more lately since I get into a game where the other team has all the other spawn points,
and nobody wants to think and use their brain and capturing the closest ones to get a better advantage again.

The droids could move around a bit more. On the larger maps they actually circle buildings, the entire map basically,
but on maps like Frozen Dam and the smaller map similar to Frozen Dam it just stays in one general area.
What I really don't understand is how they can shoot me and find me when I'm a sniper fully cloaked. Really??

Waiting to unlock the Bazooka so I can own campers in tight corners....

The Infiltrator is a pretty strong class to use.
The name thing gets annoying sometimes yeah, but it's fair to use...
What I hate is when they also use shotguns and just run around randomly firing and hitting you from a questionable range.
Now whenever I use the shotgun my accuracy sucks, even hitting them in the face or body.
When you get hit by a shotgun point blank, no matter what area of the body you hit, you should be dead. But not the case.

The secondaries are decent for it, I just use the bazooka though it only has one shot.
The unlimated sprint can be okay but yeah people whore it out to just brutal melee you.
But there is a way to counter brutal melee. I don't know exactly, but I basically just melee back and sometimes I counter it. It's weird.
I don't think you kill them but you stun them for a bit and it gets confusing, so just follow up.

The assault rifle is okay, burst mode is okay but I'd prefer the brother's (Tactician) weapon over it, except the silencer.
In close range if you tap it and kill someone they should go down.
It has good accuracy, overall a good balanced weapon.

The medic was what I used in the beta until I used the sniper more often.
The medic and engineer always have the worst weapons in war games in my opinion.
No way a damn medic uses an LMG, a heavier gun yeah, but not as heavy as a LMG.
LMGs from medics in Battlefield: BC2 were good because the iron sites were better (plus you could equip red dots).

Healing is always good though sometimes I wish the restart time could be shorter.
In Battlefield: BC2 you could heal someone over and over again, in KZ3 you can't.
I guess to avoid getting easy points they did that, but sometime it hurts you if you're trying to flank someone and there's only one or two medics around.

A drone following you is okay, but if you're trying to hide it sucks.
You should be able to withdraw it possibly (and take up a square) but yeah they get annoying sometimes as well.
As well as standing up after you unlock that perk the medic class is so-so for me.

Online play (multiplayer): I think it's okay, I mean your usual campers and spawn campers are what I find the biggest complaint in this game.
The maps on Warzone are basically built for the other team to do it, it's really stupid.
Environmental blockage is annoying as well, and what the heck is up with this Claymore bug?
You lay a claymore down, and a bit later, it just randomly disappears without anyone getting near it or any explosions nearby?
I think it's a bug, I'll search online to see if other people have this issue as well.
Hurts when you're a sniper and there's no ammo crates around and your only protection nearby just "disappears".

There's three modes which give depth, but I mostly play Warzone (on Frozen Dam) most of the time.
Operations is harder cause, again, campers.... It's hard to argue since one team is going to a point you know.
And it's worst in Operations than Warzone because they can't flank you from the other side, since it's momentarily blocked off.

The exoskeletons and jetpacks are fun. It's kinda dumb how enemies can easily sometimes shoot it down (exoskeletons).
And sometimes you can't jump over certain walls which you should be able to do.