I think, it would be a nice Thing when in the Zorin Taskbar Settings would be an Option to adjust the Border Radius. It could be in Form of a Line between ''Square'' and ''Round'' and on this Line is a Toggle. Something like this:
Square ----I---- Round
Another Way would be like on Arcmenu:
In the Zorin Taskbar Setting You could pack it int the Position Tab to the other Adjustments:
And in the Floating Settings You could pack it under the activated Floating Theme:
It is only a minor Thing, I know. But it would be a nice minor Thing I think.