Sounds perfect.
However, it`s going to take something akin to an act of congress to get all the mobo manufs to adhere to this.
THEN, convincing the case manufs that they won`t lose sales cos their connectors don`t comply with slightly older mobos. It`d be short sighted of them I guess, cos they could include in the box a connector that will allow the user to revert back.
Agreed tho, it`s a pita. When I was thinking of the project that I`ve now shelved, I purchased mobo power connectors, male & female, to do exactly this job for me. (with some scope to add some other things like fan power or something).
Give em hell!