A new HC, with a new GM and OC would make a huge difference. Our main problems are the mediocre or bad offense and a front office that has no good plan to build a contender.
We can nitpick the defense but I would say it's been consistently top 10 since rac got here. I doubt we can find a better DC who is available
It comes down to talent and the Colts were the better team in the playoff game, whether that was due to injury is to be determined.