I've also played KoF XII on 360 for almost two hours but forgot to list it. Yes, as always I'm very late to the party!
Didn't expect too much after the tirades I've read about it on ng.com...
Ah well, it plays quite well, some of the new "sprites" look okay, others are too huge and bulky for my taste (Ralf, etc.). Had quite some trouble with the new movelist of some old charas like Iori and Kensou. Is Iori the new Freeman now? I don't get the motivation behind some of those changes (if there is one).
The backs are okay-ish to good, at least they tried to capture the atmosphere of a world-wide competition. Music is not too annoying.
No endboss... haha... I mean, yeah, KoF is a fighting game that should be played in 2P for maximum fun but that shouldn't be taken as a lame excuse to save a few bucks by not stuffing another incarnation of Rugal in a KoF game...
... grave mistake on SNKP's part, the missing endboss and story bits let the game look even more bland. Speaking of 1P, I played on normal and hard but noticed no difference in difficulty between the two.
And there are more stupid details, like the missing move list option in practice mode. ...did I miss something or were the dev'ers really THAT dumb? This isn't fucking '94 anymore, SNKP!
Overall, XII looks and plays incomplete and rushed, IMO it's not a good base to build the coming KoF games on. SNKP obviously tried to do the Capcom reduce-to-the-max thing as seen in SF IV but ended up with a game that has too much reduction and no max. The chara lineup could do with more old/better faces as well. They took out lots of good old charas but kept most of those friggin' anorexic freaks we saw from 2k3 onwards. God I hate that androgynous Ash Crimson fuckface with a passion, his hair alone makes me want to run amok!
What KoF needs is a bit of fresh air that blows off the dust and foul smell of a slowly rotting franchise, not a hurricane of new ideas that also sweeps the old magic away. Again, it plays okay-ish (even though I don't like that repel thingy that reminds me of a lame version of Alpha counters) but KoF always was more than just a fighting game.
IMO SNKP kept the chaff and threw too much of the good wheat away. Reduce to the max? Improve to the worse, more like.