Well, here's RPS's review of it:
http://www.rockpapershotgun.com/2014/03/04/wot-i-think-south-park-the-stick-of-truth/It's a fairly standard RPS review, in that they ultimately liked the game but there's some fierce chest beating about what's "acceptable" in video games.
-Zero PC options for the most part, 1 display resolution (I can see the reason for this.)
-An ironically underwhelming port. (Game doesn't like to recognize the controller, shows controller prompts on screen, ect...) They claim it's actually....better on the PC than on the consoles?
-Stuttering issues on consoles.
-More than few bugs, game getting stuck in loops, dialog getting cut off at the end.
-Terrible balance in the combat and overall mechanics. Which they find brilliant, but problematic because there's no bite to a lot of the game due to easy enemies, ridiculous amounts of powers (which actually sound kinda deep) too much money and an endless supply of potions.
-Oversights, like having no way to sell mass amounts of inventory despite getting a shit ton of stuff to sell in game.
-Redundant audio in places where it really counts. (In a game with more voice acting than 90% of games ever made, I suppose this is one I can overlook. All though having one "bark" per character does seem a little short sighted.)
-A few quibbles about content. Because they feel the game lacks an overall narrative point, it's hard to take some parts of it because there's no....what's the word....higher purpose to the offensive parts? The game, unlike the show, isn't trying to make a point with what it's doing. So it makes the most egregious examples of offensive or distasteful things seem like pure potty humor...whereas in the show those things are often making an ironically cutting point. It's RPS, so, their interpretation is going to be very specific to them because they're sensitive to a lot of social/political issues.
All that said, they did everything in game and clocked quite a few hours? So they enjoyed it. But they lay a lot of problems at Obsidian's doorstep, and call them out because rocky games are often a thing with them. They also feel that, for all the work Matt and Trey did on the game, narratively it's just not as strong as the show. (It's been said M&T didn't want to use an episode-quality idea for the game, so they just kinda ran with something generic.)
I'll probably be getting it when it's not AAA-priced and it's been patched.