I like being able to select colors, but it can be hard to get exactly the right color. I'm pretty anal that they all must be consistent, selecting exactly color #80 is painful in that tiny slider. A proper color selection dialog/screen would be nice, with some presets for the most basic colors.
it would also be nice to be able to select grey, blck, or white colors.
There would be challenges related picking a foreground color automatically, but maybe that could be configurable too.