Plating seriously needs to go. Being punished for helping losing lanes is nonsense.
My bottom lane is 0-4 and about to be 4-man dived by top and jungle. I respond, succesfully stop the dive, and we trade 3 kills for 1 death. Good play on my part, right?
Wrong. Meanwhile, the 0-1-0 Diana at middle lane AFK pushes, takes three plates and four waves of minions, and comes out with over 2000 gold. I'm now completely and utterly fucked and almost a full item behind, because the plating gave her 540 extra gold, on top of the minion waves, and one more push can take the turret and remove my ability to safely farm through my disadvantage.
When your team mates are losing, the entire game just snowballs out of control because of this bullshit. You can either help them stay in the game and lose your lane horribly because the opponent AFK pushed, or stay in your lane to protect your turret plating and let the losing lane snowball out of control, then wait for them to rotate and destroy you. There is no good option.
This mechanic is honestly the stupidest shit to have ever been introduced to League, and serves no purpose other than further reducing the agency a single player has over the game, which is already unacceptably low.