It really is a shit competition. The only positive is that our reserves can have a competitive game but I am sure you have to play a certain number of first team players who played the previous match. Just totally unnecessary for me which is a shame to say as we have had some good success in the competition.
Yeah, IIRC it's 6 players from the last fixture. Not sure if this includes those who remained on the bench in the last fixture or not. It's meant to make it more competitive as then there should be some first teamers in the starting line up but I think most clubs still manage a way around it.