I've been going back and (finally) playing GalCiv2 ultimate edition in-depth.
- The freedom to put anything/anywhere is useful and I would like to retain that. Maybe I want to put the engines on the bottom for some strange reason, or pointing in random directions.
- The ability to hook pieces together like lego-bricks was a big plus in GC2 for me. I didn't have to fiddle with getting things exactly right and it mostly just worked. I would like to see more pieces and more varied styles and generic pieces in the new game. Maybe even "art" packs that can be bought for $1-$3 to expand what you have.
- Weapon and defensive systems could be interesting if they were positional, but that might be too much micromanagement.
- One nice-to-have feature would be some sort of "this is how big your ship is, measured in meters from bow to stern". It was hard in GC2 to get a feel for how big the ship I was designing was turning out to be.
- A way to scale the entire model up/down rather then part by part. I made a really cool design, but it's about 2x too large or too small, now what?
- A 3D pop-up window that lets me zoom in, rotate, and closely examine a ship part before I bring it into the canvas to place on the existing ship. In GC2 it was difficult to find out which modules looked like engines and which ones looked like cockpits. Or how big the various items were at the default scaling size.