I think Chip was is really good coach that needed the offseason to look at what he doing and adjust things. He probably lacked the temperament to coach in Philly, though. I was listening to a podcast and they said one of the things Reid loves about KC is that there aren't 50 media guys following the team.
It seems like Howie is the GM, and that can't be considered a good thing. If it's a rebuild, then maybe it isn't the time to have an expensive QB. But all that doesn't sound like an attractive job for a coach with several offers
e: Philly fans would know better, but I was under the impression that Banner, Howie and Reid were all constantly fighting for power in the second half of Reid's tenure
Howie as GM was instrumental in bringing in a lot of the talent that Chip either cut, traded or let walk. I'm not sure why Howie replacing Chip is a bad thing. The Eagles also consistently managed their money very smartly under Howie. Howie would have never signed off on the DeMarco Murray deal, for example.
I think the in-fighting was more between Banner and Roseman. Once Banner left, things were OK for the most part.