Minor enhancement suggestion:
On the Autodiscovery Queue page,
If there's only few nodes and the user wants to add only a single sub-node, it'd save one click if the tree was already expanded.
(I hope such trivial RFE's are also welcome.)
I think this would be nice but inevitably someone else would find this irritating and want to turn it off, or configure it to some other number. Not high enough priority to add the user preference hooks to make this viable.