this is some really great feedback - thank you!
working on QoL for next update so much of this will be fixed/implemented. I'll be making the right click context menu much more useful in general , and adding more options to the settings menu for greater control. Yes combo cap among other thigns will likely be perma upgrades as part of meta progression for full game - yeah i need to make the sell area much less in the way or/and add option to get rid in general - the 3 star point is a great catch.