Cannot express enough what good reasoning by LCF, SatAD, & Smonroe have stated here so far. There's no doubt in this fan's mind as to why these new coaches are here. And, that is to change the course & direction on both sides of the ball. Each of these coaches have been selected for direct links they've had via experience in the NFL. Very good experience, I might add.
I firmly believe that one of the biggest targets to excel in is defense. And yes, it's not going to be an overnight fix by any means. But, the foundation through these coaches has been laid in cement, at least for the foreseeable future. A very good foundation IMO. That's what it takes to start a formidable team. I'm very optimistic that these guys are going to impress quite a few once the ball gets rolling after the draft, free-agency, OTAs, pre-season, and the regular start.
The starting point of good NFL coaches is pivitol to any franchise that wants to win, and win consistently. I think Indy has already achieved that by their staggering "11" newly appointed positions.