I just felt so much of it was simply callbacks and fan service and added nothing to the story at all, and that includes Paulie/Pussy/Silvio. You could have replaced them with any other mafia goon and it wouldn't have changed anything. They shoehorned so many of the past references that again added absolutely nothing to the story (varsity athlete, shooting the hairdoo, poor you etc etc). I groaned every time one of them was there.
There was zero subtlety to so much of the movie. One example is the following, and I'm not going to spoiler tag it as the actual directors and writers spoil it themselves. There's a scene in the warehouse where they talk about a shipment they've just stolen. One random character who's line is the only one in the whole movie says something about "boosting some tv trays". So any fan of the show knows exactly what happens next. It just treats the audience like an idiot and has to be spoonfed. A better way would have simply been to have Sil say something like "that latest shipment we boosted, I left you a Christmas present in your car". Then have Dickie drive home, get out of his car, open the trunk, have a POV shot of what's in the trunk and then a second later the shot rings out.
The whole racial subplot was tenuous at best, and just seemed extremely forced. And don't get me started on how they fucked up the relationship between Tony, Junior and Dickie. There was a nice way they could have wrapped up their respective story's rather then the hamfisted way they attempted.
The only things that I thought they did well was the revelation of who was responsible for Dickie's hit (but they really messed up the motive), and that I thought the actress who played Livia was a cross between Carmela and Livia from the series - I thought the mannerisms were a blend of both which was a subtle nod that maybe Tony chose Carm because he was trying to replace his mother, but given how bad the rest of the film was I can only conclude that was purely by chance as opposed to design.