You are entitled to your opinion, but like...
Sighs this is a complex subject.
The new art though, is *objectively* better than the old. The old, in many cases had literally impossible Esher-like shapes.
Where if were to hand the art to a 3d modeler and ask them to interpret it directly into a 3d asset? It could not be done as the shapes didn't make sense. They would need to make massive amounts of changes just so it could exist in a virtual physical space. Now everything is well constructed, and can logically exist in a 3d space. While also being less greebly (scrappy in your words), to be more vanilla friendly but it is *still* more greebly than vanilla. Additionally they were way too dark before, to the point that it was problematic.
And regarding the Chengdu specifically? The old one's bay had *too* much depth. Where the edges vanished into a dark void, projecting a shadow that was nearly pure black, also in the presence of bay lights on top of that! Additionally even near the center where it was not shadowed? It was so dark, that it didn't agree with the overall Z axis (height) of the ship! Now it looks like about 1/3 "up" relative to the overall box-hull section which is exactly what makes sense. And it still has significant depth even looking at it in a vacuum! Good edge and contact shadows but without ones so intense that it creates an Escher-space heh.
Anyways, an old friend of mine who mentored me somewhat on art once told me. That outlines, overly intense shadows, blown out highlights, and overall not subtle rendering? Is a crutch to lean on to cover for one's own lack of talent, skill at painting, or neophyte-level design sense. I am far past needing any such crutches, and overall? This conversation reminds me of back when vanilla first started getting de-greebled and a good few folks thought it looks worse. But I would eat my own hat, if many still thought that. They learned the errors of their ways, and perception, as they saw how much more readable the sprites became especially in-game when they are rotated and scaled is a very different thing from looking at a static image.
And in the end? The fact vanilla has moved on, is exactly the reason I have reworked the THI art. THI was always meant to be more greebly than vanilla, but when vanilla got smoothed, it became far too greebly. And the reworks are still more greebly than vanilla, just not to such a comically out of place degree anymore