I'd prefer it if they would put in a way that we could put players out of their preferred position, but at reduced % of their final score.
eg, I'm going to have a 0 in my forward line, but I have a midfielder available. I could play that midfielder in my forward line, but I only get say 80% of their final score.
Such a system would also allow us to put any combination of DEF/MID/RUC/FWD into our 8 bench spaces.