IT would be nice to have ability to remove fork, i have a component that will work with 1.7-2.5 and want to build a version that will only work with 3.3+

The Fork functionality is NOT for cross compatibility.
It is used for working on your component, and then being able to regenerate your component without loosing changes.

Your component is writen in the last standard way (almost) and the cross compatibility layer is in various places :
- legacy folder
- mcv.php file

Hope it helps