Right now if you group select an item, it grabs everything inside the bounding box. Instead, grab items that are fully inside the selection box will make this easier to use and more versatile.
Note to Dev’s: other software does this with a left to right for touching and right to left for full contents only. So no need for holding down keys during the selection or anything like that
For now, one way to do it is to grab as little as you can, and then while holding the Shift key down, click on the items that you do not want to be selected.