So when does Letang get gud?
You are absolutely right. Most of this board can't seem to grasp that Maatta, Schultz, and Cole were/are the real "core" on this D and the reason it seemed to just keep winning. For every "great" thing that Letang does, he cancels it out with 1.5 negative things. For D men, just follow the 5v5 GF% as a quick performance guide. If they are doing their job, they will be >50% and helping you outscore the other team at 5v5. This is why PIT was "shockingly" able to still win the cup this year without their #1D. You don't miss a player who effectively gives you a 45% GF% at 5v5....especially when that player is played like he's your #1D. If you aren't outscoring the other teams at 5v5, you aren't going to win very many games. It doesn't matter if that player is the most impressive looking one out there. If his impressive plays don't lead to a >50% GF, its meaningless. I notice all the bad plays he makes, and it's a TON. He gives up the most number of high percentage shots against on this team. His on ice shooting % (of entire team) when he's on the ice is way below average as well. He's not even creating high % chances when he's on the ice "risking" these passes of his.
With respect to Letang, his last couple years, he has had negative effects on just about every PIT player's GF% with him on the ice vs without him. It's not good. He's "been" hurting this team for a while, and this year is just beyond comprehension how bad he is. Niemi bad. If he was a "new" player that had a -16 in 14 games, he'd never see the NHL again after that kind of start. I don't think he recovers from this because he is just so, so, so bad right now. A 3X improvement is not enough.
This team is in the late 90s mode now, so what do you do? Do you healthy scratch him? I don't have the "fix it" answers beyond addition by subtraction.