Another ergonomic mouse

Using my mouse as often as I do I've noticed three specific problems that haven't been designed for very well in any kind of mouse.

1: When I need higher precision I find myself gripping the mouse harder and pushing down a little. Which makes sense and does help but there is a better way that doesn't strain my mouse hand.
2: Clicking is always the same motion, done by the same finger, actuated via the same tendon.
3: The mouse always needs to be flat on the movement surface, which requires a slight, awkward and tendon-constraining twist to my wrist.

This mouse would solve all of those problems. Instead of a loose mouse body, the mouse would consist of a box about 10 by 10 cm in size. On top would be a thing shaped a lot like a traditional mouse, with very high precision tracking for less movement. It would come in six hand sizes and have buttons for all fingers. It would also easily tilt or be set to stay tilted for different wrist directions to the hand. Clicking would be performed the traditional way, done by one's ring or little finger (requiring less pressure since less weight is typically there) or by using a separate foot peddle.