Look, I by no means think that Dowell Loggains is a first-class offensive coordinator, but firing him because the team was built to be run first but went pass happy is ridiculous. Sure, Loggains was calling the plays, but Mike Munchak could have reigned him in at any point if he thought the team was being to "pass-happy."
That is 100% on Munchak.
Really, firing Loggians would be a nightmare for this team. That would give Jake Locker his third offensive coordinator in the three years. It would also be really tough for Munch to convince a good offensive coordinator to come here while he is a lame duck coach.
This is why the best decision is to completely clean house- not rearrange the deck chairs on the Titanic.