[NoOne]

as far as the game is concerned, no; i wouldn't worry about development, either.

stats/results are driven by ratings, not vice versa. morale may or may not influence performance, but unlikely to influence development much. in my experience of extreme winning vs. not caring at all about w/l in mil, the human eye certainly cannot see a difference. so, as far as development is concerned, results in the minors are meaningless. even numerous future HoF'ers will have crappy or pedestrian MiL careers -- RL and in game, too.

(player ai eval is it's own thing... should ignore "Overall" rating, if human, anyway)

go to league structure -- the drop down for league level will tell you all you need to know. e.g. there's no difference between A/A+ but, there is a Short-a level of competition. if it's not in that list, the game doesn't "see" it as different just because the leauge is named "High A Ball," for example.

as far as overmatching... if you have ai controlled teams, they will fill in a certain order, i think. most players will defintiely pool in 1 of the 4 rookie leagues, as opposed to spread out. probably by league id order with the last having the pool, but you'd have to look. i'd bet it's the league draft picks initially pop into before the ai moves them after draft completes, or if delegated to the AI.

anyway, that may cause a minor stratification of the rookie leagues -- in a uniform way in regard to the AI.

But, more random for the resulting promotion/demotion pattern for each human player. so, if all human players, i wouldn't worry at all unless there's some league-wide guideline about it so everyone follows-step.