I guess I'm in the minority. I liked it okay--it certainly exceeded my expectations that I formed when I heard 60-something Stallone was going to do another Rocky movie--but I thought it was average at best.
I thought Stallone was, for lack of a better term, "trying too hard" in his direction. I also didn't think his motivations to get back in the ring made a lot of sense--I just don't understand why he equated his love and grief for Adrian with something that was incomplete with his boxing career. And, technically, the dialog that was clearly put back in in post was pretty bad (not the writing, though at times that was sorta forced, too, but rather the dubbing).
The one part that I thought was the most interesting was Paulie's regret about how he treated Adrian. I thought that was a very powerful scene when they were at the old ice rink.