The destruction of the Executor was, among other things, I didn't like about "Return of the Jedi".
I have been reading about naval combat. Ships weren't taken out of action when the bridge was destroyed. In many cases, the ship still had motive power and firepower. When ships were destroyed, it was because the damage was greater than the ability of the crew to compensate.
So, the Executor would have been disabled, then destroyed, by a convergence of firepower from the Rebel capital ships. The SSD would have shaken off the impact of a single fighter into its bridge. And, if the ship did go off course, automatic systems would have corrected the flight plan.
I don't think the crashed ship the Millennium Falcon flies into is of the same class as the Executor. The arrangement of engines is different.