I'm just hoping they make HMs more... I don't know... hidden, maybe? -____-
One of the things that made Unova so damn easy was because all the HMs were given to you as part of the plot and events that you had to do. I can't think of a time where I actually had to look for an HM. To me, up until that point, HMs generally made the game more of a challenge. In order to advance in the game, you needed a new HM to make your way to a new in-game area. In past generations, it was something that was a little more hard to come by than they were in Unova.