Subaru clutches are notorious for having a bit quick clutches..due mostly to the different rev band of the boxer motor. If you think the MT is crazy, the 4AT is even more idiotic(loves to downshift randomly in traffic).
Exhaust isnt that bad as long as you have some jackstands. Could go get some borla knockoffs for a better rumble...
Id recommend these sites for research and questions:
sl-i.net (Subaru Legacy International, great site, few members here are on there plus lots of Canadians too!)
LegacyGT.com (mostly for newer gen Legacies, but still good resource)