Hi great start! I love the UI design methodology.
Some modeling things I'd love to see:
- ability to move the bottom right edit panel to the top / make it floating
- ability to move modifier circle on the left / make it floating
- Edge cut tool
- wireframe or faceted shading with wireframe shader modes
- double click edges to select edge loop
- a toggle which always checks for creation for non manifold mesh after edit operations
- non destructive modifier for subdivision
- non destructive modifier for Mirror mode
- expose vertex size setting and option to change to circle
- improve obj import support , some triangle errors and crashes on moderately sized files (250 MB files)