I give this episode a 48. The story was fine but the execution was awful.
First and foremost, most of my complaints here are the same as the last five episodes so I'll sum them up quickly in point form:
-No story progression at all, just a bunch of world building
-Focussing on just one group of characters takes away from the experience
-Story could have been summed up in half the time, but the episode instead drags for way too long
-Content is so slow paced that the episode gets boring
All of these factors are at their worst in this episode which is horrible. Who actually thought that a full episode With just Tara and Heath was a good idea? I like Tara but this story felt like a B-plot in an episode, not an entire episode. Also the content should have been seen much sooner. This episode is still focussed on the aftermath of Not Tomorrow Yet, which at this point was 10 episodes ago. It's awkward to finally show this story now instead of as a B-plot in an episode like The Same Boat which could have benefitted with a B-plot like this. I feel that parts of this episode combined with parts of The Same Boat shown last season would have made for a much more compelling episode.
One thing I really didn't like was Tara's change by the end of the episode. She decides against wiping out another community because... reasons? It's not clearly expressed why she would choose to let Oceanside survive rather than help her own people. I feel like this is only an issue because Oceanside wasn't fleshed out well enough though.
I did like the thematic focus on surviving alone vs surviving with others. The Walking Dead rarely touches on themes like these in recent seasons so I will take what I can.
The Oceanside settlement was really bland and the characters weren't anywhere near interesting to me. Most of the time spent at Oceanside felt like a total waste. I agree with all of your points regarding Oceanside Fluids.
This episode's big success though was the ending, which is why it has a score close to a 50. The final 5 minutes were excellent (barring Tara's decision to not reveal Oceanside's guns). I was pleased that we didn't see Tara getting told that Denise died since it's a rare example of The Walking Dead using the principle of show not tell. The decision to have her mourn silently instead of openly crying was excellent as well. I wish this story was part of the last season since so much time has passed since Denise's death that I hardly cared. I was also very happy to see Rosita's character continue to develop as she tries to get information out of Tara.
-I really hated Rachel. She was a right prick and it was satisfying to see Tara flip her off.
-Beatrice taking so long to shoot Tara and talking was a really stupid moment. If you are going to kill her, then kill her already!
-Heath came off really well in this episode. He's had few appearances but he seemed very likeable in all of his appearances. Hopefully he isn't gone for good.
-The Heath walker tease wasn't only The Walking Dead's usual manipulation, but it was also nonsensical. All the other walkers were covered in dust and the one that isn't just happens to have the same hair and shirt as Heath? That was downright stupid.
-I really enjoy seeing post apocalyptic buildings, so I liked Tara going into the gift shop. I would prefer more short scenes like that opposed to five minute scenes of Negan just talking.
-Six episodes in and the plot has hardly moved since the premiere. The Walking Dead really needs to pick up the pace.
-The Saviours were stupidly inconsistent. It makes no sense for them to kill all of the males since Negan clearly just wants to work with other groups, not murder them all. Also why didn't the Saviours take all of the guns like they did with Alexandria? The Saviours continue to function only in ways the plot demands them to.
Overall this episode was just plain awful for the most part. Some small things pleased me, but I really feel that this story would have been better off as a B-plot of another episode.