It's clear that Frontier left the Horizons building/base assets that appear in Odyssey alone, and I guess that they're not playing fantastically well with the new lighting and stick out compared to the rest of it. I can't know for sure, but I can imagine it being either a decision based on a technical reason or, imo more likely, that it was a lower priority item that got pushed aside due to Odyssey being behind schedule and the need to get it to release.
Though I fail to see how pointing that out is relevant, leading on from what wrote above, it's also clear that assets produced for Odyssey are well made and I highly doubt that onfoot Thargoids will not have been made to the same standard, being that they would have been exclusively made to exist in Odyssey, you can look at the SRV and ships to see that where they have put the effort to update Horizons era assets, they have come out looking perfectly fine.
Leading on from what
I wrote, or from what
you wrote?
I was not necessarily directly addressing the near discussion -- more spinning off from it. Nor did I restrict my musings to possible
on-foot Thargoid content; I strongly suspect that if there are Titans coming (or whatever they may end up being called in-game), they were made Horizons era, but not released until now -- have they since been updated? -Who knows....
Ship and SRV texturing was problematic at Odyssey launch, and there are still dashboards that are so shiny (...and the more aggressive tone mapping doesn't help either, I suppose), that it is difficult to read the holographic displays they go behind, but at least all the emissive textures in the cockpit and elsewhere, which launched diffuse, have now mostly been sorted out.
As for on-foot Thargoid action: I am sure if it is coming, it will be strictly cordoned off to "blue icon" locations. Whether this only means current Odyssey settlements coming under attack, or the Thargoids establishing their own freshly designed ones: Who knows...
What I was imagining, was that if Thargoid stuff is to dominate the larger narrative for some time to come, Thargoid asset texturing might have been bumped up in the: "Whenever you've got a spare minute, fix some of the old stuff that broke with the update" queue, now that commanders are revisiting old locations to try new stuff, such as discovering the new property of transforming Guardian relics....
We do have that old place where there are some parts of what may once have been a leggy Thargoid strewn about... A bit of cyclops-like carapace, and some blue pincers - all with very low resolution texturing; They seem to look nothing like the leathery fellow we've seen in concept art, which would make me a bit sad, because I think that one looks absolutely great (the other one, not so much); In any case, the apparent scale would seem to imply that if these gals are to enter settlement buildings, they are really going to have to crouch down to pass through the airlock.
I never noticed before, by the way, that tablets left on tables in the game can have music playing on them.... Or maybe this is just a one-off seasonal addition, given the music choice in the one I walked past a while ago. :7 (Maybe also made possible by the same update that enabled the graffiti decals at select concourses.)