Hi, sorry about the short reply, will try get back to you with more detail later but I need to get some sleep! My first thoughts are that your progressions should be a lot more gradual and totally agree with physiochile that stability of the Wikipedia reference-linkrotator cuff and scapular stabiliser strengthening needs to be done ALOT before doing concentric exercises with weights. Coming up to 3 months post-op things should be pretty well healing up at that stage and I'd expect your sessions to become more agressive, but wouldnt ususally expect patients to have significant pain still. And at the end of the day the surgeon is the one thats been inside your arm so to speak and knows exactly what his done so I'd always suggest following their advice, most surgeons have their own post-op protocols they want the physio to follow to ensure the best outcomes. You can find examples of these protocols and guage where your at compared to what your currently doing if you search for SLAP lesion repair protocols. To be fair though, sounds like you have a well experienced physio and has prob handled loads of patients similar to yourself so I'd suggest he knows the right patients to push and those that need to take it easier!
Good luck anyways, hope this helps put your mind at ease!