I only managed to get to the under-water bit. Not sure if I was doing something wrong, but it seemed like I wasn't descending at the second drop-off.
But as far as I got it looked, sounded and played great. Very smooth interface.
I wasn't a fan of how many movement inputs it saved. For me, just remembering the next potential movement is ideal. Any more than that and I tend to over-shoot.
The flare stacking and respawning was a little annoying, but I assume that's not finished.
EDIT: I got it. I actually really like the free-look mode and the way it snaps to the closest grid view when you let go.