Lendl has used Murray as the launching pad for his coaching career - magnificently - with Murray's desperation contributing bulk of the mass. Heck, even the split has been timed perfectly, if not a little late.
How much of a knucklehead do you have to be to now not capitalize on it - to the hilt - instead of running around competing @ tournaments infested with half dead clowns? Even if you don't know what he could be aiming for, you have to realize there would be not many similar opportunities - with as much longevity and potential for success.
Besides, Djokovic is not too far removed from the malaise Murray was stuck in when Lendl entered. Heck, even better. Djokovic couldn't be more motivated right about now AND the degree of difficulty is nowhere compared to what Lendl faced with Murray. Why? Because just 'an already faltering' and an aging Nadal is the ONLY credible hurdle vis a vis three @ the previous assignment.
Not enough? How about this clown has already established a proven record similar to the plane already being airborne needing far less energy to move up.
More? Isn't Czechoslovakia closer to Serbia than Germany - from physical proximity to culture to ........?