You're not being constructive at all, you just said it looks bad, you need to give actual advice to be constructive
WTF!?! I have stated that his other, newer work is a template on how to improve it!
Your pretentious white-knighting is just dumb and awkward!
You seem to be missing the point that witchking stated. If you look at the credits for his mods, it is clear that he is not an artist. It directly states that he does the programming/writing side and acquires art from other users. The ship sprites in this mod looks different not because Revanant has "improved" since then, but because they were drawn by different people.
The ship sprites in this mod were made by Gwyvern, who also made
Legacy of Arkgneisis. Unsurprisingly, the art style between these two mods is the same because it is actually created by the same person.
Giving art criticism to Gwyvern would be more fruitful than giving art criticism to a programmer.