I like that approach, yeah. It can help to nicely separate volumes in greebly ships. It is not unique to DP/DDP though and they are not the first games that used it either.

These look great!
Have you adopted the (Do)DonPachi approach to slightly highlighted edges on big ships? :D

Good stuff. Terrific palette for a dark deep space environment.

I like them, because they look not flat, but solid and it feels like they are really floating in deep dark space.

Really nicely detailed!