Did you try to play with a keyboard/mouse on MCPE actually ?
It's a pain ! A real pain !
Please listen to the community and make the mouse work like PC.
Add a toggle to disable the touchish setting and move the view as the mouse moves.
Just google "minecraft + mouse" and you'll see hundreds of people asking for this. Think about chromebook and popup features on this OS now. Clairly, it is becoming like a real computer and more and more person is going to play with a mouse.

Thank you for listening.

Please if you're a player that is concerned or interested in this change, upvote/like/follow this issue so that the team behind minecraft get attention on this ! Thank you !