Honestly, my performance between my laptop years ago and my rig now has made a huge difference. I could never snipe or use precision weapons, but nowadays my HVR rifles are my favorite firearms of choice. I still freak out and gunspasm using full autos while in handshake range but I can actually SHOOT people now semi-reliably, and unlike before, actually get MVP every now and then.
That being said, it'll be interesting to see what happens with the matchmaking system. Being away for years then coming back and taking my rusty (and for some reason still) silver arse into bronze to re-learn the game and constantly facing off against rocketards and launcher spammers kinda set me back a bit, but an HVR usually sorts them out. We'll have to wait and see I guess. Honestly, if someone fires the game up after not having logged in for years, they should be set to bronze considering all their old guns and mods will have been expired, and they'll be using the same perma-stock weapons and incomplete map knowledge as everyone else.