Historically, I've found CAMs with accomplished CM can play AP relatively well. In fact, if you player instruct him to get forward, dribble more often etc, you can pretty much replicate CAM whilst he starts in a CM position. Will allow you to carry on using your current tactic but also take advantage of his more attacking nature. DLP requires more defensive minded stats coupled with good passing and creativity, which I don't know whether he has? Anyway, it seems like a bargain. Let me know how it goes if you sign him.
Also, if you do a quick search engine find of: rafinha fm 2014, you'll find a FM story detailing his performance in England, as well as his stats as he progresses. Could convince you for sure.