Injuries and poor GM work sank this season, IMO. While I don't like 1) the lack of a solid O line and 2) wholesale personnel changes on the defense, I can't blame him for the loss of Palmer, Johnson, and the losses along the O line.
A team usually goes nowhere when they lose their QB for the season. That's a recurring theme across the league, year after year. They could have recovered from just the loss of Johnson, but without both starters this season was a lost cause.
Special teams issues, to me, centered around Dawson's poor play for most of the season and lack of good personnel on the special teams. This I relate to Keim and who he signed.
The defense suffered due to the free agency loss of all those guys in the secondary. The replacements were not nearly as good with man coverage, forcing Belcher to play far more zone coverage than in previous years. Unfortunately, the front 7 were designed to play in front of a man coverage defense, so there were major issues due to mental mistakes for at least half the year.
I don't want to see anyone scapegoated and fired. I want Keim to do a better job. I want Keim to trade up, if at all possible, to get one of the 2 top QB prospects, as the pool isn't very deep this year and next year is too late. I would support him trading two firsts and a second, and a third for one of those guys, a true franchise quarterback.
I want much better free agent signings to bolster the special teams. I want one good press-cover cornerback.