The mouse look was actually something I was kind of wanting wandering around.
There were a lot of cool scenic locations, that almost beg for the ability to just stand somewhere and look around, yet you can't really look down or up very conveniently.
Also, walking locations where you might fall, be kind of nice to be able to look at where you're aiming at. Minor nit mostly, just fit the explore a scenic island theme.
There is some level of mouse look. I suspect together with not locking the cursor/the cursor leaving the window, this is part of why people report issues.