I prefer rolling subs you can't ask players to pay $100-$200 to sit on the bench, 14 players you can guarantee at least 60 mins every week.
know alot of young players made it to WL squads sat on the bench for a year and then hung up the boots, rolling subs in WL would also work, there isn't the numbers in womens to just let these girls walk away.its not about fitness its about creating a model that works