Not gonna lie I haven't seen much of his recent acting. Nonetheless my second reservation concerning this guy is his name. Not only is he associated with (come on we all know it) pretty average/poor movies but his name is too big and not in the right way. Star Wars thrives on less well known and/or versatile actors who can fit their roles without the audience thinking, 'hey its that guy from that!' The Rock won't be able to pull this off.
Just saw Pain and Gain. He was quite good in this movie and was probably his best acting yet. I am fully convinced that he could pull off a character of some sort in this universe.
The fact that the only real reason people want him in this film is because 'he's the Rock' is kinda indicative of exactly why he shouldn't be shoehorned into the franchise.