I thought the enhanced motors gained from learning about them in the Hangar weren't supposed to use extra power, or is that only relative to the Mining Motors?
They don't use more power for the distance you travel. 50% more speed for 50% extra power per second, so you're still spending 1.5 power for 1.5 progress. Whereas the mining motors cost 2.5 power for 2.0 progress (25% more power).
I have tweaked some of the wording to make this more apparent, but it may need some more work once more of the bugs are out of the way.