I'd like to leave my toughts about the direct!
About Surfing
Yeah!! Finally, as a surfer myself I was really upset they didn't include it in SM, but they absolutely redeemed themselves. I'm really hoping it will actually be like a minigame of sorts that you can bring your mons with you. Imagine finally surfing with you Alolan Raichu, or your Floatzel, or maybe even Makuhita like Brawly did! Really cool addition.
About Mantine
I really like that Mantine is now a ride Pokemon, hopefully it will indeed be diving as everyone is speculating
About the UBs
I love these guys too, specially assembly! I've always wanted like a tower / wall / rook Pokemon, and apparently they fulfilled my wish. My typing predictions are Rock/Ghost for assembly and Fire/Fairy for Burst.
About Lycanroc
In the first place, that Z move is fire!! I love how it removes terrains as well. But here's another thing I've been thinking of. Since Necrozma's formes were revealed as Dusk & Dawn Forme somewhat, I really think they'll pull a Mega Charizard X again and announce Lycanroc Dawn later on.