Better Platform Drag
Platform thrusters don't accelerate the ship faster and faster — there is a limit. There is a drag force on platforms, much like in air.
Higher speeds bring higher drag, but the drag is also proportional to the width of the ship, like in real air, or a platform colliding with asteroids. This mod replaces that dependence by a dependence on platform weight (mass), which is possibly more realistic(?) and/or has better gamefeel and means the exact shape of your platform does not matter, only its overall weight.
The factor is balanced such that round platforms are unaffected, whereas the aerodynamic thin platforms currently dominant in platform race competitions are nerfed.
Credits
Thanks to Wube and to Hanakocz at Comfy for pointing out this could be modded.