Let me tread carefully as I'm only casually following all of this, but one of the greatest strengths of AEW is the use of enhancement talent on their youtube shows to help build their midcarders and the sheer variety of talent they have either at their fingertips or under contract in order to keep match-ups fresh. If they can afford it, they're much better off cycling wrestlers off in an "off-season" sort of format or using them in non-wrestling/promotional roles (like how Kingston announces). There are probably some other things they could do, like create six-man belts, but in general, they're far, far better off using a large roster to protect talent and keep talent fresh.