Here to disagree. Rebalancing is a non-issue, not all encounters will even need rebalancing. Once we add Barabrian, Monk, Bard, Paladin, Sorcerer... 4 characters is not going to feel like a party, it barely does now.
I think a nice compromise is 5, thats generally the sweet spot for pencil and paper groups. I would rather them rebalance around the player taking 5 actions every round in combat than 4. This is not divinity, most turns you have one action you get to do, the broken bonus actions that they added are not a solution.Rogue cunning action is basically just Expedius retreat now. Shieldmaster feat is miqutoast without the bonus action shove mixed in. Dont get me wrong, its incredibly strong giving Warlocks bonus/disengage.... letting warriors peel with shove.... endless midcombat hiding with all classes. But these things water down classes and feats that they are stealing from and all to make the 1 action economy work for 4 players. Just give us 5 and fix these things