I'm excited about selection sets and the new selection tool access.  I can see 2 things I'd like added already:

1) I want to 'Add to selection set' if I make a selection and right-click on a selection set.  Right now if I miss a selection in a set, I have to use that selection set, Ctrl+select the additional entity, make a new set, delete the old, name the new (again)...

2) I'd love to see my selection sets in a pull-down on the selection context toolbar.