Hello
Artstudio has very much become my main painting app on desktop and iPad, especially since the draggable brush size keys were added. This is something I realise needs to be repeated every time I open the app so for me at least, there's a more logical solution. I have become accustomed to being able to permanently show a colour picker panel docked to the interface. In other apps this is part of the general prefs, so when you quit/reopen the app, the same UI opens. In Artstudio the Color settings panel is collapsed by default so you always have to click to open it then spend time wondering where it wil fit so as to not obscur the canvas etc. For me the best solution to that is to permanently dock it along with layers etc. I'm no interface designer but I've uploaded an attachment mock up of how this might look.
Thanks
Sav