Looks ok ...
Points ... if you remove all GSE extensions that would include the reports extension (which I would remove first) then the queries should be removed also.
Not sure but I think the Mail Security -Exchange group might be your own custom group.
On moving on to E2010 and MSME .... please be aware there is a more recent version in MSME 8.
Not sure what Exchange SPs you intend to apply but min req for MSME 8 is E2010 SP2.
MSME8 also has a Patch 1 and just released Rollup1 (all available with your grant number at download site)