They just need to separate the two entirely. PvP should have it's own restricted gear which is only obtainable through playing PvP including versions of PvE gear which have been specifically balanced for PvP. Doing so would make the PvP experience more competitive and skill-based since it would rely less on finding that RNG roll, and would mean that balance passes could specifically target PvP gear and not interfere with PvE. For all it's faults, of which there are many, Anthem actually showcases what you can do with a PvE system when you don't have to worry about it breaking PvP balance. You can push your builds to extreme levels by focusing on single target damage, AoE/Elemental damage, cooldown rates, etc. It's similar to Diablo in that regard, where you can find some really interesting synergies between weapons. Destiny has always felt like a very watered down version of an ARPG and never completely fulfils the power fantasy because they're always somewhat restricted by how far they can push PvE without breaking PvP.