Awesome idea, but let players have two-three outfits, and make them able to wear better one once they reach threshold (like top 20%, top 40%, rest).I expect this to be controversial, but I think the game would benefit from the better scored players being more decorated in a given match. Why? It helps allies stick with strong players and helps people identify who the biggest threats are on the other team.
One way to do this would be to activate selected cosmetics based on the scores of the player.
Additionally, it would be awesome (but probably a lot of work) to do high score (top x% ?) variations for gear.
I know this seems a bit extra, but imagine that you see someone and can make a visual determination of the skill of the player. That is really helpful. Plus, it'd probably feel really rewarding to get the extra bling in a match, even if it's temporary.
@ParzivaI - it works only if you can see weapon/armor/face. Don't work in bannerlord with so much uniform outfits, once more people will pick their bought items it might work again, but not now.