That's not even the biggest question of the season (though that has annoyed the ever living **** out of me).
Why did Sasha kill herself in the coffin if her reasoning behind doing so was to **** Negan's plan up? Would she not be more effective being alive and trying to kill him? The whole flashbacks thing make it seem like she was going to do this heroic act (I thought the water bottle thing was just a decoy to make us think she was going to kill herself, but then flip it and have her attack Negan, maybe wounding him in some way before her eventual death). But no, she just commits suicide so she can be a useless zombie that she of all people should know, are easy as **** to kill and escape.
The episode would have been an absolute flaming bag of **** if it wasn't for the tiger killing two people. Give me more tiger killing people and I'm happy.
Also, how did they not have any of Negan's main henchman die? I thought for sure we would get a satisfying revenge kill for Morgan on that one long-haired dude who was a dick at the supply drops for The Kingdom. Like a nice staff through the head, but nah, just a bunch of random extra deaths. The only main character death was to Sasha, who was pretty obviously going to die.