I really hope that Z-moves aren't the only new moves and that we also get move tutors and some Pokémon having an updated move set.
Bonding with the Rotom Pokédex sounds cool but I don't use Z-move in-game so bonding with him for that would be pointless but eh I will give a go and see what other affect he will yield.
Very pleased with the Rotom Power feature. I never liked how O-Powers were incorporated into the previous games - the justification and story surrounding them felt totally out-of-universe and off-tone. This is much, much better.
I love Rotom and I consider him more of a character than a tool, Im glad to see his role expanded. Gonna be sad when the next games dont have it.
The new Z-Moves animations are doooope too