Here's a question, and i've never checked so i dunno..maybe its a thing, but there should be POI's...like HGE style of thargoid remnants for a day or two after the weekly update/tharg cg end. Or new planetary tharg crash sites in the system in questionThis was most certainly not the climax nor the end of this storyline, but merely the end of a two week incursion of three systems. Thargoids being sent home via Superweapon happened before (this was the second deployment) and will likely happen again (well, attempted at least).
That said, some sort of in-game representation of the deployment shouldn't be too much to ask. Something simple like an inbox message would do, maybe whip up something from the existing Goid sound FX that gets played system wide to signal the retreat. "Show, don't tell" is a constant struggle for EDs storytelling due to (among others) the setup of the daily/weekly tick system, so any opportunity however small (and especially the small ones) should be taken - especially those times when there's a high likelihood that CMDRs are present to witness an event, and this Superweapon deployment scenario would've been a prime candidate.
Some kind of aftermath evidence other than the damaged stations