Please bring OpenType features to the right panel, within the Text section! The current OpenType Features menu is a hassle to use.
It has 3 levels, and automatically closes when you select an option, having you dig through very thin menus to toggle options on/off.
The way other design tools approach this is much easier:
- The menu stays open for you to toggle each option on/off.
- All the options are laid out on top of each other
- There’s a preview when you hover the option with your mouse.
To be fair, all of those options beyond “Text on Path” (on the Sketch app) could be added to a menu on the sidebar. See an example of how easy it would be for users to access these features:

