well, I would try to increase the flavor built into both classes. the ranger... had funny flavor, and the rogue had to much "politically correct thief" flavor. With this I would shoot for a more swashbuckler or smart fighter flavor.
I dunno, I never saw much problem with ranger flavor. To me it seemed like the second biggest fantasy staple. But to each his own.
Thanks to Kymme for my sweet avatar of Bendar Roy, my kick@$$ dwarven rogue.