Yep, and with all due respect to Khedira, being an experienced stabilizing effect is basically what he brings. Vidal pretty much had double the effect on the team even in his weaker days, and thats just on part of the game (defensively), not when you consider his overall complete abilities. Even when "struggling" in Bayern right now, he pretty much allows Bayern to focus entirely on attack and he covers them with the work rate of two players (FFS they played last game with two left wingers lol).