I think where I disagree is your point that what Jellico was doing was needed. the Enterprise was one of the most advanced ships staffed by some of the best crew in the fleet who were battle hardened not just explorers so why would Jellico need to change so many things?
A captain has to lead, manage and direct but he does not need to be authoritarian.
I felt his command style was not required and it made him seem like he was an ass.
However, it was - at the time - his ship, the same way another Admiral - James T. Kirk - got the Enterprise from another Captain (William Decker) and changed things to his own specifications.
Each commander is different.
I'm sure if Sisko took command of the Enterprise or Admiral Janeway took command, things would be set a certain way until the crew became familiar with one another.
Interestingly, in Season 1 Picard was a bit of an ass anyway, and not just certain episodes. He changed into speechPicard - albeit still self-righteous - in later seasons, then actionPicard in the movies.