I used to use TrackWrestling's "live stats" feed to monitor who's assigned to what mats. I think Flo has now absorbed them, but I expect that they will have a similar feed with upcoming mat assignments. Your idea does make sense, though. I think the main problem there is the mats either get out of sync (e.g., many of falls on the mats with #1 vs #32) or you have to burn extra time during some VERY long sessions to keep them in sync. The current system allows them to balance out the matches at the cost of not knowing your mat assignment until late. The pigtail matches are another possible issue, but there's only 20 of them (10 in the first round, 10 in the consolations) that you could spread across the 8 mats semi-evenly.