Yes, you're right. Grigs has made moves that didn't pan out like Todd Herremans, Khaled Holmes, & Lance Louis for instance. But, to his credit, other moves are working like you said.
My only point is this: He [Grigs] spent too many early draft picks on WRs vs protection up front. Our pocket is getting better week to week & Philbin & Grigs get credit for that & our running game with Gore & Turbin has shown flashes of brilliance hitting creases.