While you're taking a look at fixing some things in SWGOH please consider this. Sandbagging has become a problem for guilds above 380m GP, and is making Territory War unfun.
Intentionally having members sit out and not get rewards, so that the rest of the members can move from a losing box to potentially a winning box, by fighting in a lower weight class is a bummer. That seems like unintended game design as this incentivizes players to sit out of TW and NOT play the game. All other content is designed so that you want to participate as much as you can to get the best rewards.
Is it too much to ask that TW matchmaking is based on total guild GP, instead of total signup GP? Then the advantage would go to the guild with the most active members, and encourage players to play your game.