Ok I've looked at the rankings and I'll give my opinion.
fix the 0-1 to 1-0 issue inside of individual tiers. Also, In individual tiers wins should take precedent and be worth more, and losses worth way less. I believe ELO rewards quantity of wins more than just quality to fix some of the 5-2 to 2-0 issues. (IMO 5-2 guy should > 2-0 guy). Your ranking typically doesn't have this problem so as long as you fix the 0-1issue this will be fine.
In overall tiers, losses should be worth more and hurt performance rank more. The 0-1 player should be higher than the 0-7 player, even if the the 0-7 guy had harder matchups. Overall considers all factors it just tier strength, so you have to consider who is more valuable within the algorithm. If you lose 7 games your useless and hurting your team every week, if ur 0-1, it's just a minor loss. Maybe instead of point based on who has the highest points, you should try the average chance that player can beat any other play. (Similar to gxe on showdown).
I am not statistician or whatever so hopefully that makes sense.