EGO Perks, Grenade Damage, AND Shield Strength. The last one isn't a huge increase but I enjoy that My lvl 1000 Respark Reloader IV isn't as good/strong as my lvl 2400 Respark Reloader IV. And without any DLC released yet, I wouldn't be able to speak for anything else. The more perks, stronger grenades and shields you have the better you are in PvP. Which for me is where it ultimately boils down...making your character the strongest possible. And yes, weapon stats do increase as well. I had an epic Swarm Cannon I got early at EGO 204. I then got another epic Swarm Cannon near EGO 2400. I wish I still had both to give an example of the difference in stats...but I gave the 204 away to a friend because it was substantially less impressive.

