Well, shortly after he left Ewood, rovers fans were treated to watching possibly the best attacking team ever to grace Ewood park, certainly in living memory. That side was unbelievably good at times, beating the likes of a great spurs side 7-2 at home and an excellent West Ham team team 8-2 away from home. When the team did actually did get relegated, 5 years later, the biggest problem was the Polio epidemic that swept through Blackburn, leaving the club stranded at the bottom of the first division and facing a relegation battle from the first fixture.
So I'm not convinced that his stories about the training not being up to scratch were true. Having said that, the average fitness of a Pro football player in those days, was a mile behind what it is now - but that was at every club, not just Rovers.
Doog was always regarded as being a bit "eccentric", partly down to shaving his head [unknown in those days].