I played the demo earlier today, I wasn't really won over to be honest.
The shooting mechanics and everything is ok, feels like the recent RE games. I just... it doesn't feel like Yakuza. The heat moves are boring as shit (shooting explosive things, wow) I would have much preferred stuff seen in the previous games, with unique heat moves for various guns etc. I'm sure there are more, but still, the ones I did see were dull.
There does seem to be depth with upgrading guns and buying new ones, training new partners etc at least.
I would have preferred a game that plays just like the old Yakuza games, where you get into random battles with Zombies who say stuff like
"Hey buddy, you're real lucky. Lucky in that you get to give me your Brains!"
*VS Zombie Street Punks*