I don't actually want Haley back, although I think he's a great offensive coordinator. His personality and "intangibles" make me nervous. The problems we had this year weren't Miller's fault, no matter what anyone says. Guys missed plays. From the QB to WR's dropping balls to the Oline not doing their job. It wasn't the playcalling and schemes. Haley introduces a variable we can't even account for. I'm much more inclined to keep Miller and develop dudes, especially QB, given our system and how I think the whole thing will work in 2012, given how part of it worked in '11.
If you want to replace someone, replace Grimm, who's lack of protection has killed our team for years, even during the Warner era. With protection Warner is like 12-4 (with Fitz, Boldin, Breaston and Edge running it). Without it he's 9-7.
(Edit: Should be noted, Miller is more a Whis type guy anyway, keeps his mouth shut and does his job. He's a grinder. Haley always fiery and talking to the media. I know they're good friends, after working together, and sharing an office even, in NY way back, but still. Friends or not, Haley isn't a Cardinal, Miller is)