Wow, thanks everyone for the replies
I realized after putting it in-game myself it looked a little too bright, especially compared to other ships, which is certainly something I can fix. I was also unsure about the shading, but perhaps if I darken the ship down a bit the shading will stand out more. I also completely missed the fact I didn't shade the bottom part that faces you the same as the rest, but now that it's been pointed out, it's obvious. A set of fresh eyes is what's needed sometimes I guess
As for the size, I didn't really have any template to draw from, so I just kind of eyeballed the largest freighter from FISH and figured that was about as big as I should go. The sizes were just arbitrary "oh, that looks close enough" measurements, so I could certainly scale it down a bit

It seems that the width is the biggest issue, so maybe I'll narrow it down a little, which might actually make it look more realistic since the top deck is a little wide right now. I'm not sure how difficult that will be without redrawing the whole thing, so I'll have to mess around with some tools to try and make it work.
Also, in regards to the green being too light, I was very limited in choice of colors in the palette. I used the four shades of green that are separated near the bottom, which seemed like the closest choice aside from the 2nd company color. Which leads me to a question: Do you have to specifically activate 2cc in order for those colors to work? As in, would I be safe using them for a regular color, without the user being able to switch it? If I could that would be very helpful, since there are many more shades of that green.
Again, thanks all for the comments, it's important I get this stuff right before I have 10 ships done. Although, it's not like anything's happening at a blazing fast speed anyway
PS: Is anyone else having trouble with the forum lately? Seems like every other time I come here now the page just stops loading and I have to wait like 10 minutes to get back on. Took almost 30 minutes and 3 revisits to get this post up
Luckily I copied it each time just in case...but still.