Not a fan of this Eternals system.
First off, the kill window at the bottom feels redundant since there is also one at the top (at least give us the option to disable the bottom kill display). Secondly, I don't really care enough about these personal achievements to have to see them every time I hit a milestone in-game. Lastly, why put certain counters on a pay wall? You don't make enough off of skins? It just feels like more things to distract me while I play.