It's not that their exactly made about the new stuff, more frustrated that the old stuff hasn't been given any love in a while.
My personal frustration is that EA often adds features, but the features aren't fully fleshed out and don't really add much. The Morale thing seemed like it would be cool, but it doesn't really seem to affect anything at all in game. If my guys are happy or sad, it doesn't really matter to me. I'm not going to have a star demand a trade. I don't have to worry about guys not wanting to sign with me because I trade players a lot, or because we're frequently in the league basement. Similarly, there's no real excitement to any of the out-of-game action. The trade deadline, the free agent signings, all of it just feels pretty flat.
So, I'm not really mad they added something new. More frustrated they're expanding the mode before it really works that well.
That aside, I'm eager to see how the sliders work. Sliders in this game have been a source of frustration for a while. Some seem to work opposite of how we expect them to, and others don't seem to change much at all. It will be really nice if the new sliders can get the AI to miss on some passes, and maybe make it a bit more worth your time to pay attention to who's on the ice.
As it stands now, it doesn't really matter if my shutdown line is out on the ice, because my 4th line grinders work just as well on the defensive end of things. They can send out Malkin and Crosby, but I don't need to worry about getting Steen and Stastny out there, because the faceoff is likely a toss-up, and the defensive side of things won't matter much.
Better sliders could mean that Crosby is going to be lethal with his passing, while their 3rd line center might not be so dangerous, instead of the current mode, where every line can make laser passes all day with the AI controlling them.