I know that in NHL14, there wasn't really much difference between guys like Crosby and someone like Reaves, aside from Crosby maybe having a slightly better chance at my getting him to score a goal, and Reaves being able to run over damn near everything in sight.
My biggest frustration is that they handicapped what little ability we had to affect it. Unless the sliders have suddenly started working well, we'll be stuck having to manually edit our own rosters entirely. The Revamped Rosters did a fair bit to counter the attributes all being so close in the stock game, and between that and sliders it was possible to get some pretty nice gameplay. That said, without the ability to even work around and share rosters, it's going to be pretty rough for people if the sliders don't work again.
I just wish EA could embrace letting the end user control their fate to a greater degree. Stop worrying so much about what will or won't work with some temperamental kids online, and let me actually make my game play the way I want for a change.