I wish there was something, anything at all really, that persisted through wipes. Even just some simple persistent stat-tracking would be great.

Early to mid wipe every raid feels impactful. I'm grinding towards something. Whether it be grinding out rubles to unlock useful hideout upgrades, XP to unlock flea market/higher level traders, or things like Max Strength/Endurance to fly around the map.
 
Once those 4 are maxed out (which if you're playing a lot really doesn't take too long) the game quickly loses a lot of its appeal to me.
 
I'd love if there were things (that didn't affect gameplay at all) that persisted through wipes. Something like weapon mastery, or tracking total kills with different weapons, etc. would be amazing.
 
The game hits a point a few months into any wipe where it just feels like "What's the point? It's all being wiped SoonTM anyways" any little small persistent thing to keep working towards would be nice.
 
Right now all we have is "Time Played" that isn't completely wiped out every 6 months or so.