Good afternoon again! I will not tire of declaring love to your application! But there are a couple of ideas.
I will arrange them in order of importance for me.
1) Saving brushes in abr format, for further transfer to Photoshop. Faced such a problem that I really miss this moment.
2) ”Puppet wrap” is also very necessary. I don’t know how much it is possible to implement. A very useful tool.
3) In the "adjustment" menu, you can add "color replacement".
4) In the "selection" menu, add the function "color range".
5) There are sometimes not enough “actions”. I don’t know how much this can really be done.
6) You can also add a pen.
P.S Thank you for your attention!