I can't make the camera/board stay to a place you rotate and let go, I play tested it that way, and the change in perspective makes clicking on certain moves impossible and causes you to play moves you didn't intend to play, thus I must force it to a top down view whenever a play is possible to prevent these issues.
As for the previewing enemy moves, it actually is implemented, and if you play via direct peer to peer (which currently requires port forwarding) or in sandbox mode, you'll see it, there is an option to turn it off in both cases. The matchmaking system currently disables it by default (as previewing moves is intended to be disabled for ranked mode, when it's added), though this is changing in the next version for non-ranked matchmaking to display move previews.
Thanks for the feedback! :)