My take is this
A chain reaction of events occurred when Warne left
Taylor lost the dressing room when the Richard Wood incident happened. I think the squad was already fragile and still reeling from Warnes departure.
Luckily for Taylor he had the good start to fall back on and we limped to safety.
His limitations were badly exposed this season in both signings and tactics and I believe he still hadn't won back the dressing room. Losing became a habit and he rightly had to go. I felt a bit sorry for MT because we did have a ridiculous injury list but I also felt some injuries were just excuses by players not to play for him.
We then took far too long bringing in Richardson as a head coach rather than manager who appeared to be far from being first choice.
Richardson clearly isn't a motivator of men like Warnock and players seriously lacking in confidence and used to losing are continuing to do so at an alarming rate. That's why we should have moved heaven and earth to get Warnock in to do his thing as we were still close to our rivals at this time.
Injuries and training facility issues have hindered us no doubt but we have gone even further backwards under Richardson.
If the current decline isn't addressed I could see League one next season also being a struggle.