While this team is old on paper, most of the talent and frontline depth is young and/or inexperienced. Didn't they say there were 31 Cardinals making their playoff debut last night? That's a lot for a team to overcome, especially when a lot of the coaching staff is in the same boat. The bright lights of the playoffs just melted them down and they never had a chance.
Add OL, DL and WR in the draft/FA. I think some of the youngsters, like #20 just hit a wall by the end of the year. They will be fine with continued playing and development.
Jettison AI...Make reasonable offers to Green and Kirk (Green would be more of a priority, IMO, than Kirk), unless someone else better is available in FA/Draft. Figure out what the hell you have with Simmons and Collins, once and for all. If Collins is finally the answer, maybe can get something for #58 (compensatory). Re-sign Jones, even if guaranteed short term money is a bit high. Put Watt in bubble-wrap for the off-season. Consider Moore as a Darren Sproles type player, but who can run routes when needed. Give Chase and Conner deals to comeback together, unless Chase can be easily replaced. I think Conner is the priority.