The game physics do not have to be perfectly realistic, and they never were.
All that is required is that the game is balanced and fun, and the physics support gameplay, are consistent, and are not completely foreign in concept.
People say change makes no sense, but it really depends on how you think of it. Say you put two equal massed but different size objects under water and try to rotate, the larger dimensioned one require more force due to friciton. That being said, I don\'t know if the physics are entirely consistent if the movement in all directions are not affected by this change.
In any case, there is some friction in starmade space and your ship slows down when you stop accelerating, a lot faster than what would happen in reality. Do we have a ton of people complaining about that? No. Why? Because it doesn\'t mess up thier current idea of gameplay. If the deceleration made it so you had to hold W down constnatly, it doesnt mean the whole mechanic is no good, it just means that it need a little tweaking.
Regarding OP cube ships: performance and efficiency at low cost is not necessarily pretty, because prettyness is not a factor in those areas. Keep wishing it were not so, but I am betting you will be ignored based on almost every single mechanic of the game being in line with that (not to mention reality). I have yet to see a valid suggestion that would reward asthetics without adding a ton more confusing and restrictive building rules/bonuses, which in turn would be exploitable in the same type of way, and also be as boring and ugly as a cube ship. With wise building, you can make a decent looking ship that has good performance. If you are trying to recreate your favorite scifi show ship to scale, then don\'t have any illusions: you are creating a model, not creating a optimised warship for gameplay in Starmade. The problem isn\'t the game, it\'s who you\'re playing with is incompatible with your idea of the game.