Alright, I finished binging this series from the start today. And I gotta say, from the mostly "just unambitious fluff" style that it started on, now I can feel the story is actually taking progression seriously, and it was already pretty ok without it.
Backstories, new important characters, and the ever on-point moe comedy really help this manga stand out to me. Really glad I found it, now that Fecchipuru first story is ending (assuming I understood that announcement correctly).