That would have redeemed at least two seasons worth of bad TWD for me in one single scene. Epic. =)
I get what they were going for with the scenes on the walls. The garbage pail people reveal their treachery, all looks lost, Negan moves to unveil Sasha as his final “fuck you Rick” move, only she pops out and tries to eat his face. At that particular moment all of Negan’s people are stunned because they all know Sasha was supposed to be alive, and all the garbage pail people are distracted and curious because they’re all thinking (assuming they even have thoughts) “what the fuck is Negan doing, is this part of his plan?”. In terms of distractions, it wasn’t bad.
But to assume that the Alexandrians can get up off their knees, grab weapons off the ground and just start shooting garbage pail people without anyone reacting is just plain sloppy. If the Alexandrians had still had their weapons in hand and been standing, like they were seconds before the scene went down, then it’s believable. Or if The Kingdom or Hilltop chose that exact moment to appear and started shooting garbage pail people off the walls, then it’s believable. But to have it go down like that, THEN repeat the whole process over again inside the walls with the Carl scene, it just felt sloppy. Those two scenes should have been combined. Forget the stupid “we all know Carl isn’t going to die” scene and make the entire confrontation, betrayal, hopelessness, Sasha surprise, tiger rescue sequence of events go down at the gates.