Everyone is talking about it, about how terrible it was.
Imagine how much BIGGER it would be if they did it right.
Imagine this instead (graphic description):
Negan beating Glenn to death on camera. Caving his head in, Glenn's eye popping out, going into convulsions, screaming "Maggie!"
Negan beating his head until its nothing but his body with mutilation where his head should be.
Everyone screaming and crying. Maggie screaming in terror. Rick sobbing. Negan laughing.
Rick getting angry, says, "I will kill you. not today, but I will kill you."
Negan responds, "You still wanna act tough, I'll have a few of my men run a train on your boy. I'm sure a few would be into that sort of thing."
Rick looks down, defeating, crying, says, "No, you're right, I'm sorry"
Negan grabs Ricks chin and says, "YOU did this. Your birth didn't have to be so hard. YOU made it that way. I hope we learned our little lesson. I'll be back next week for first payment. Ta-ta."
The final scene being Negan walking away, his back turned to the camera. Lucille slung over his shoulder with Glenn's brains dripping off.
^^^People would be talking about that WAY more. That would have been historic. There would have been news articles about "Did the walking dead go too far or break violence boundaries?" There would have been reports of people having panic attacks in front of their TVs. It could have been glorious. Negan shows up and within 5 minutes he has brutally murdered a favorite character. THAT is an introduction.