Mainly the fact that Cody and Moxley shouldn't share one ranking system as the TNT Championship shouldn't be considered to be on the same level as the World Title and instead should be sort of like Cody's answer since he can't challenge for the World Title. This would then also allows other talent to be seen as contenders for the TNT championship and not for the World Title, because what makes someone qualified for one title and not the other if they share rankings list.
Both Brain Cage and MJF seem to hold the top spot on the list right now and both men seem to want a shot against current World Champion Jon Moxley. This again prompts the question why would either man challenge Cody for the TNT Championship and not Moxley. Lance Archer as number three makes sense due to his record but he lost to Cody in the finals of TNT Championship tournament. Luke Harper just lost to Moxley and though he could take a step down to the TNT Championship stacking the odds against Cody. In my opinion, Cage vs Moxley, MJF vs Moxley and even Wardlow vs Moxley could be money and they can't save every match for when fans are back, because it's not possible. The writing is wall at this point though that soon enough MJF will become World Champion in All Elite Wrestling.