I wouldn't agree entirely, in that Tidal Bay still regularly loses lengths at fences but, so far, he hasn't looked like falling (hopes frantically that she hasn't put the mockers on him) - he has too strong a sense of self-preservation so he tends to put himself right and find a stride.
Tidal Bay and Long Run are polar opposites. I get the impression that Tidal Bay wins races despite physical problems and a strong desire to do things his own way. Long Run, on the other hand, doesn't seem to be following through in his races these days - I think he also has physical problems but they have affected him mentally in a different way.
DO - totally agree. I remember Ruby saying of another old rogue (either Cornish Rebel or Le Duc) that the horse ran best when he found trouble in a race and Ruby would routinely try to put him between horses.