This system is not working, now a days everybody is sacrificing the bad roasters in shield training, LR, etc… to low the MMR and win in the main PVP event! Why don’t replace to something like this:
‘Take the best five pers, calculate the average, then update the player with THIS MMR…’
In my case my average of the 3 best pers are 85 (Ares 85, Thor 85 and Storm 85), So My MMR would be 85, and I would fight only players with this (or close this).
PLEASE, stop make me waste time in SHIELD training… kkkkkkkkk
An MMR based on level averages is a bad idea. Taking your suggestion, I could also run a maxed 3* and also throw in two 2* characters at lvl 57. Like say Patch, oBW, and maybe Bullseye for kicks.
In terms of getting seeded into a bracket, I think an average of the level of your top 10-15 characters could be used, plus a star modifier and perhaps an additional modifier.