You've said a couple times that game shape is more important at higher levels which is incorrect. This can be a poisonous thought because it can lead to managers in lower leagues not doing everything they can to maintain game shape, such as constructing their roster in such a way that certain players are bound to get too many minutes.
All your arguments supporting this have been along the lines of (paraphrasing) "GS isn't as important at lower levels because you can sometimes win without it, and a lot of your opponents suck at it, unlike higher leagues". This argument is BS because you can replace GS with virtually any skill or strategy in this game and those things will still be true; it is not at all specific to GS.