We discussed that, but ultimately, we decided it was best to stick with the images from the Ships Database and such. They are more appropriate considering these are in-game images.
The images you are referring to can be used as galleries for each ship, but not as the main image. That's what we agreed upon at the WCPedia.
Switching to "other images" would require at least the level of Howard day's work... And you can't jusk ask him to do all the ships....