Esca is old enough that Dende can recognise him at first sight despite having left Namek over a decade ago? You could assume Dende met him on his visit in the Boo Arc, but it seems like a big stretch to assume he'd become well acquainted with him in such a small timeframe.
The chapter was one of the better ones by this arc's standards, even when having some major contrivances and CIS. I do like the idea of side characters like Piccolo and Kuririn being given some shine, though the relevance of their opponents in the plot cause this to just be the obligatory second-act battle in almost every Shonen nowadays, as well as some of DB's own arcs with enemies that ended up as just filler villains. 73 is at least a more interesting villain than Moro due to his powers being better defined and his background fitting far better into post-Freeza Arc DB's world building than his master. Unfortunately, he's still just a redrawn Hit with #21's gimmick, but Moro is even more unoriginal in backstory and powers and only has a more original design going for him.
It's unfortunate that despite the relevance Piccolo could hold in the plot thematically due to the focus on New Namek, it seems he's going to get shafted yet again. At least Gohan might be given some respect like in the manga's ToP, but I doubt it'll last once Moro shows up.
At least the chapter confirmed Merus is able to physically overpower Base Goku, thus confirming his power isn't just in his reactions.
Keedounan said:
The chapter starts with them having brought Krillin, as well as the suggestion of fighters who could help. However, Tenshinhan not having a cell phone when Dende could locate #17 in the previous arc is a poor excuse for putting him on the bench.
To be fair, constantly zipping across the planet to collect everyone would have made things more difficult for those actively choosing to participate in the battle getting to the meeting point.
One could also wonder why no one suggested to bring the aforementioned #17, or #18 instead bringing Krillin and suggesting the guy who didn't even make the cut in the Tournament of Power.
Considering that the threat wasn't treat as so demanding that Kuririn was fine with waiting until Gohan had finished his class, I'm guessing they weren't treating it as enough of an immediate threat for many fighters to go out of their way. Bulma described Kuririn as the only one with free time on their hands she could bring, suggesting #17 was busy with his job and #18 was busy looking after Marron.
Gohan arrives and saves Piccolo, with him confirming that he's indeed the strongest on Earth aside from Goku and Vegeta. This should close the debates on his power from ToP arc, unless we assume that he got weaker since then.
Vegeta has been shown to be capable of using SSBE at will, whilst Goku could be naturally assumed to be top dog due to status-quo (or maybe being able to use Pseudo-Kaioken now), so I wouldn't say it clears up the PSSBs VS Ultimate Gohan debate in the formers' favour.