Lasso selection tool
Select multiple areas by dragging or drawing a lasso around an area.
On freehand (grayscale), have the ability to lasso out an area and then color either inside or outside of the selection so that you made so that you can fill the area using the fill tool without disturbing the rest of your work.
Selah Fairport commented
Yes yes exactly! Lasso option where you draw a circle and all selectable areas that are fully encompasses in the lasso circle are then selected (the same as multi select just without having to tap everything). This would be so useful for the more complex designs that have lots of small dots/sections. I have chronic pain and nerve damage and this tool would be amazing. Please!
Add a "freehand outlining tool' that allows you to highlight large portions of the image without having to individually tap the spaces.