I think AI is going to make or break NHL15. If they get it right, i'm sure a lot of people can look past their issues. My frustration always came from having to use sliders to get anything even close to decent gameplay, but having the same issues always present. Trying to turn up ice with the puck was frustrating (You felt like you were in sand) and the goalie AI in terms of shots, and the AI being so incredible at times, while your goalie is letting in multiple slow wristers along the ice with no screen.
If they can get your teammates to act like teammates, and do simple things like move to get open, set up screens, fight to keep the puck in on the powerplay, or, even give us the ability to program these things with a better play editor, i think it will go a long way in making NHL15 leaps and bounds better than 14. That's what i'm holding out hope for, because so far, the improvements look to be in lighting, player bodies, and stadiums. The faces still look awful on most guys, and the gameplay video left something to be desired. Granted it was a very short one, it still looked an awful lot like NHL14 with a facelift.