Buffalo did ok but decided to leave after ownership transition which knowing what i do now.... ownership is the ultimate factor in NFL.
Jacksonville i think he did really good. If they never hire coughlin, the majority of that defense is still there and they could’ve explored QB in FA/draft instead of trying to go full transition to a 3-4 front.... with literally the best 4 man front defense in the league at prime ages.
This sounds like a homer take but as soon as coughlin took over i think he wanted to tear down and rebuild immediately but Doug was a good enough coach that they won more than they were supposed to and hindered their plans.