You actually don’t need to switch to Basic tab, so it “just” takes 5 clicks to change color. Of course 5 would be still more than the usual 3 clicks, but you can reduce the required number of clicks to 3 by creating a json file that contains all the segment names and colors that you use frequently, or further reduce it to 0 clicks by creating a segmentation node with empty segments that you can use as a template for each new segmentation.
If you just want to always use the “Basic” color picker then you can change that in Application settings → Application startup script → add ctk.ctkColorDialog().setDefaultTab(0) to the end of the displayed startup script file.
Windows uses the application name as title in all dialog boxes that have no specific title - not just in Slicer, but in all other applications, too.
Maybe adding a bit more specific title (“Terminology”?) could be useful, but the current behavior is not faulty. Therefore I don’t feel that it is justified bringing it up twice like it was some serious mistake and doing so somewhat dulls the edge of your other comments.