I never said he had two plus pitches. I said he has two above average ones. I have heard his slider referred to as a plus pitch, but I have also heard it called above average and so I will go with above average until I get a chance to see it more often referred to as plus by people I know made that assumption on their own merit not by something they heard.
Still, he doesn't miss a ton of bats, but he induces ground balls and doesn't walk guys while still missing some bats. I don't think its a stretch to see him be a guy who puts up similar IP and ERA numbers to Arroyo (without potentially having a 2006 type season mixed in). They will go about arriving at the final spots differently, but a 3-1 K to BB and lots of ground balls can lead to success even if you are only striking out 15-18% of the batters you see.