I'm just shy of 2nd grand trial but my thoughts so far...
1) The story seems better, still too childish but it's pokemon after all...
2) The way how they did riding/flying/surfing is awesome! It's still gated but feels much better integrated than HMs ever were
3) Calling for help is damn annoying early on, especially as some 2-to-1 fights are nightmare
4) Mimikiyu is a doll, love that little fella!
5) Customization is nice feature, loved it already in G6. But damn why my character cannot have any cool haircuts?!? I wanna have something cool like that annoying kiddo that follows me always around has (whatever his name is), not the low resolution crap we're offered