Changing matchmaking did close to nothing when there aren't enough players online to form a good match.
I've been running into people both well out of my skill band, and people with terrible connections.
We need more people to play PvP, and you need to give them an incentive to stick around.
I'd start by giving new players good loot so that they stand a chance against more experienced players, but I'm no expert in this.
I just know we need more people to play PvP so that matchmaking will put people in fair lobbies.
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Pve players play pvp as little as possible. They cannot provide constant updates during the season that would make them play. They don't enjoy it, therefore - a constant incentive must be provided. Once they get the rolls they wanted, they will never touch pvp again, until new weapons are put in. It's time to accept that the huge majority of players DO NOT enjoy pvp in this game.