I do not really like Megas but removing a big part of competitive battling, and also removing just the Mega designs themselves is super disheartening. I hate that Game Freak always does this. Z moves aren't so bad, but I still don't like it.
Rotation battles and Triple battles cut from 3DS games because the models were too high quality.
Now important aspects to the Gen 6 and 7 battle systems cut, apparently because the models are hard to do in high quality. (But they're the same???)
What's next, Alola Pokemon cut because we aren't in Poke Hawaii?
Can't wait until Dynamax is cut in Gen 9.