I've played it all the way down, reaching the endgame and like ... I'm not sure what to say about it.
I'll try describing it as best as I can
So first of all you pick your class and get taken in a tutorial teaching you the premises. That's where shit already gets weird because soon enough you realise that while the core actually works, the engine or "raw impression" if you will is that none, and I mean none of the skill you will use feel at any point "fluid" or anything. Its mostly cooldown based like in a mmo, mixed with a template of Musou + RTS but like the fighting itself is BEYOND wanky especially when it comes down to single target sheaningans. It feels like there's a total lack of enemy "hitbox" or even consideration regarding the player + weapon models.
You'll attack forward and will always advance "beyond" the enemy if whatever the fuck you're using makes your toon move. There is no possibility to precisely do anything, its just that clunky
Next up, the mmo bit. That's where you quickly come to terms with the idea that the game absolutely was designed as a shallow cashgrab. Why you might ask ? well first of all, even mobile games are more thrilling than KuF 2 on that end. It consists of half a billion quests with endless dialogue and quests getting validated by just talking to different npcs scattered all around the map
Then you get to the getting objectives done mmo style, and it showed that they tweaked HARDCORE how shit was supposed to be lol. Mostly you'll get to kill AT MOST 15 enemies of one type and get items from chests, korean style. Except that for the western version, theres no rng so you always get the items in all the chests which kinda gives the impression of speedrunning everything but given how boring it is, its not a bad perk
Like you can absolutely tell with how hardcore fast the spawn rate of the mobs on the map is. You'll level really fast.
Now ... the instances ! you usually enter instances by having the according quest, at most they take five - ten minutes if you're not really good. Then you'll get your first troops and start leveling them up by you know, doing more instances
They're all level gated and tied to the story, but given the aforementionned tweak, honestly you'll always be way ahead in terms of leveling and instances themselves are a snoozefest in normal because there's absolutely zero difficulty
Which brings me to that kinda nice next point : it really is a game meant to be played all the way down in hard while leveling with a friend. Until you reach each chapter's "Climax" (usually a mental battle where the game finally truly shines) you'll get the same patterns over, and over, and over. Mmo shit, 5 mins instances unless you play in hard with a friend, some more instances, climax, talk to 23 npcs, and this all over
After some point you'll reach max level (30) and well, by then its all about looting rare units / best gear by doing timegated instances (6 extreme missions per day on top of the daily quests which are involving 3 missions done in hard, and 3 random story missions on top of some pvp / crafting objectives), and leveling these up
Quite frankly, there's just zero content at lvl 30, its all braindead farming and bad pvp because of the weirdness of the engine I've mentionned at the beginning of the post. Extreme missions are fun but badly balanced because well, they're also REALLY easy but the spectacle on screen is quite insane with thousands of units going at it. If you like the premise, go for it. There's stuff to be liked in there, but it's definitely dead in 6 months top