Also, the managers might be doing it wrong. Why is everyone training those high potential players, with weak secondary skills, whose salaries they can't afford anyway? Perhaps it's better to take some high starting skills players instead, if you build them efficient, they can be a part of your rotation at any level.
Just take this player for example
(17061476) He was an important part of Mloty Stargard team, who won B3! If perennial allstar is good enough for B3 finals, don't you think it's good enough for divs II, III, IV?