personally, i dont think this is a team that's given up on Tmac, so much as a team that is just not mentally ready for some of these games. Guys aren't making the correct reads, both on and off the puck. A simple/easy example would be Doughty allowing Giroux to get behind him in OT when there was never a play to jump in for. Kings did not have possession of the puck down low, but Doughty dropped into the high slot for a shot that was never going to come. It's poor decision making, and it's happening a bunch... just at a level that's less easy to isolate and point out. Guys aren't getting a clear when they need to. They aren't getting back when they need to, instead opting to try and pinch down. They are struggling to sort out some of the reads in the defensive zone. There's just a lot of missed plays.
I'm not going to sit here and point the finger at any one person, because a lot of the bad reads that lead to a goal happen well in advance of the goal. One guy tries to pinch in the offensive zone. Another guy misses that read and isn't back to support. Then there's some scrambling to adjust by the defense. It's a team issue, but it's also happening individually.