I like the Unit Selection panel, it gives usefull intel about what you have selected, and it enables you to refine your selection. But it is far away from the player attention, as it is almost hidden in the bottom left corner. So my idea is to make it pop right under your mouse position, then it will be always quickly accessible.
So it could be possible to create coordinate for the unit selection panel each time the mouse click is released, and data-bind somehow these coordinates ?
I don't like the idea of it being under the mouse. That'll mean it gets in the way and will clutter up the UI.
Finally i did something simple, i just move the unit selection panel more to the centre. view of the result : It is simple but good enough for me regarding the effort to do it