On item 1, Test Studio will only close the browsers that it launched. This is by design. We don't want to go along closing instances of IE that you manually launched and may want to keep open. Is this the behavior you're seeing or are these IE processes that are left from browser instances that Test Studio launched? If you confirm the latter I'll file a bug on this behavior.
On item 2, I believe the existing feature request covers it.
the Telerik team