This show often doesn't deliver with the season or mid-season finales. The program's best efforts are typically the premieres.
Regarding Negan, there have just been too many opportunities for the main characters to kill him. Carl was basically on a suicide mission, and he wouldn't shoot his damn gun, even after immediately killing two of Negan's men (it's not like he's gun shy). Anyone with even the slightest bit of fighting ability (as Rick has) could've taken him out in the trailer in the premiere. When they do eventually kill him, I guarantee we'll be all like, "And why didn't you do that before?" If he had guards around constantly, it'd be one thing, but how many times have people held Lucille when he's got his back turned to them? He's not some highly-skilled ninja master.
Walking-Dead-logic is no more credible than pro wrestling logic, but only one of these two things takes itself seriously.
I agree. My biggest problem has been when Negan first visited. They could have easily just shot him through the fence and hid out of sight from the gate and shot all of the saviors as they attempted to get in. We are just supposed to believe that they are soooo scared of Negan that they won't do it. It's not very good logic for those of us that have seen our favorite characters fight some crazy battles. It makes a little bit more sense now that he has their weapons (until maybe tonight), but it didn't work for me early on.