I thought it was an excellent episode. As I said last week, through his own hubris Rick has started something that is much bigger than he imagined. This episode showed us exactly how big of a hornet’s nest he kicked. I liked how they built the tension through Ricks’ group continually running into the roadblocks that escalated in size and number of Saviors. It was a way to slowly reveal exactly how large this group is and more importantly - how organized, equiped, and disciplined they were. Negan was two steps ahead of them the entire time. However, if Rick and his group were paying any form of attention he would have realized they were over their head with The Saviors already. The show certainly dropped hints all season:
Darryl’s RPG Encounter - The guy mentioned how things usually go, with them killing one person to get their attention. This indicated that the Saviors had a method and process that they followed to gain control of survivors or communities that they encounter. In and of itself, a minor thing at this point of the story and easily dismissed as just “these guys are bad guys” and Darryl is a bad ass and blew 'em up.
Hilltop Vacation - Again, we get the reinforcement in the events at the Hilltop with the assassination that The Saviors are not just an unruly band of survivors. They plan and they force submission. It is revealed again that their MO is to kill one person to intimidate and gain submission of survivors or community.
Carol & Maggie’s Day with the Girls - The lead female Savior had radio communications which indicates organization and a source of supply/electric to keep them charged. More importantly, in the scenes where she was communicating with the un-seen group of Saviors she was using radio discipline. Code names, back-up frequencies in the event of their communications being compromised, etc. It reinforced that The Saviors were not just a bunch of brutal survivors but a well disciplined and coordinated group.
Carol’s Roadside Shoot 'Em Up - The Savior mentioned they had seen vehicles with spikes through them back at Alexandria thus they knew that was where she was from. This reveals they’ve had scouts watching Alexandria and had already collected intel on the location and one could assume how many people were there.
So… well organized, effective communications, coordinated, using scouts who are gathering and reporting intel on Alexandria, obviously well armed, and although brutal they are following a certain ideology behind Negan. It is easy to see that after capturing Glenn, Darryl, Sasha, and Michonne that The Saviors began setting up roadblocks in anticipation of a rescue party being sent out. It is also easy to imagine that their scouts reported the RV leaving Alexandria, even perhaps with who was in the RV (i.e. Rick).
As for the ending, sure I’d prefer to have not had a cliff-hanger on the identity of who met their fate at the end of Lucille but… it is t.v. and series do this kind of thing all the time. If I had to choose who it was, I’d pick Glenn. It would be a far greater dramatic impact for him to be the one who died vs. Michonne, Abe, Eugene, or any of the others (leaving Rick and Coral out of it). However, if I was a betting man… it is Abe.