Don’t take me wrong (title). I actually start to like what you done with plugin and just discover it yesterday. Something what really missing. You added (al)most of all what can be used on sidebar in ONLY ONE PLUGIN. Congratulations, sincerely. Back to topic.
A) Big downside is that you don’t enabled all options within all widgets, what makes it to lack of consistency.Primary, it is about lack of CPT yes and custom Taxonomies in ALL WIDGETS.
B) Selection of CPT and Custom Taxonomies should be ALWAYS CHECKBOX and not dropdown. Reason is simple, checkbox Gove you unlimited options of selection.
C) Tags missing random color mode.
Cano you fix above (it is not really fix, as nothing is wrong with widgets, it is about improve)?