It's a feature that was included in FMT, and made a big difference in developing young players
I think that the Development Hub in FMM is brilliant, but a negative is that, when sending young players out on loan, they're often played in their secondary position (defensive midfielder rather than central defender) etc, so they don't really get the experience that I need them to
Armstrong Oko Flex, for example, could play on either side of midfield, or any attacking position, but I could never get him any experience as playing as a striker, as he was always used on the right or left as a winger