I agree with Cubik about the cannon - the sides and wheel profile seem too lo-res for 2k-poly model. I would add that the textures on the cannon seem too clean. I understand if maybe you are going for a cleaner, more cartoonish aesthetic, but if so then you still need a lot more color variation and saturation. likewise…
I would check Horrible Deaths Age of Empire 3 stuff to see how you can optimize and impore the looks of that ship texture. I would say that you need more painted parts, more color variation (dirt and so) and much more attention spent on the unwarp. You really need to remove all the dead space. For example, those small,…