I too bemoan the lack of content, and I have some very real complaints with the fighting system in general. But it's worlds better than the MKDA trilogy, in terms of gameplay. I'm not sure it deserves the kind of praise that article gives it...but it's pretty good.
Of course, being the MK fanboy I am I'm loving the shit out of it. It's just right back into the groove of screaming at my TV for hours on end trying to beat arcade mode though...I swear, I flip out and break stuff more when playing MK than any other game. I think it's partly because I want the gameplay to be awesome and I want myself to BE awesome at it...and it just never happens.