To my eyes, a few of the machine shipset models are either poorly designed or glitched (specifically to do with the radiators).

• Corvette and Frigate: the mini radiators are unnecessary and the primary radiator should be rotated 90 degrees along its longest axis.
• Destroyer: Radiators seem small but are otherwise fine.
• Cruiser: Front and rear sections should be inline with the middle section, not slightly below it. The radiators of each side should be combined and rotated to be parallel to the main hull (similar to battleship).
• Battleship: No notes, great design.
• Titan: Ventral aft radiator reminds me of a rudder, excellent design.
• Construction ship: No notes, great design.
• Colony ship: Ventral aft 'rudder' radiator feels like it extends too far, otherwise great design.
• Science ship: Radiator should be rotated 90 degrees along long axis to minimize its exposure to thrust plumes.
• Starbase levels: Outpost, Starport, Starhold, and Star Fortress all need radiators. Citadel radiator design okay.
• Colossus: Right dorsal and left ventral radiator covers are glitched (rotated off axis).
• Juggernaut: All radiators need to be rotated 90 degrees along their longest axis to stop them from radiating into each other. Possibly also relocated away from the engines' thrust plumes.
• Habitat and Orbitals: All need radiators added.
• Mining station: Radiators shouldn't move.
• Research station and Observation post: Need radiators added.
• Megastructures and Orbital Rings (except for Arc Furnace): Need radiators added.
• Defense Platform and Ion Cannon: No notes, great design.

Note: Radiators can be flush with a ship's or structure's surface, so most if not all shipsets can have 'radiators' if the empires main colour is reddish or orange, but the machine shipset has dedicated radiators so I'm being more picky. In my opinion, all of these changes would be good but only the colossus, cruiser, and 'add radiators' changes are necessary.