and the rest of world football would grow ever more stark.

Think about the number of players that Chelsea has "wasted" having by not being able to give regular gameplay to. Or the number of lower-league teams that have been given lifelines by being able to loan in players that are blocked from those larger teams' academies by the big money signings. If you have a "rolling 23" that goes away. Think of Man City being able to roll out midfield lines like a hockey team. Going from having to defend Gundogan/Delph/Sane to Silva/Fernandinho/Sterling in, say, 15-minute increments would crush teams.

Or imagine this happens during Beckham's LA Galaxy run. teams would be drafting him in on rolling year contracts to come in just for corners and free kicks. And while that's cool, the imbalance of other teams not being able to field a set-piece specialist either due to needing midfield horses to compete or not being able to afford one would deepen that rift even more.

---------------------------------
Photo zine(some images NSFW): http://bit.ly/USaSPhoto

"This (and every, actually) conversation needs more Chesterton and less Mike Francesa." - Walleye