When you have a hatch selected, in the Properties>Hatch window it gives you info about the pattern, scale, rotation, etc. It would be nice to have a “Select” function that would select all hatches that are made with this pattern. There is already a Match button, next to it could be a Select button. That would bring up a small dialog with checkboxes for same scale and same rotation. Unchecking those would select all hatches with that pattern regardless of scale/rotation, checking either one would limit the selection to those having the same scale/rotation.
I do all of this with scripts currently, but I think this would be a good addition - and probably not too hard to implement.