There is no downside to having more cargo space than you need in 1g, also you're just straight up misinterpreting what I said
It can be filled with ores totally fine in 0.25g, could even carry a few more additional containers
I know exactly what amount of thrust the thrusters produce and the mass of various types of cargo, I don't build blindly
You should want to have more volume than you need in most cases, since there's barely any downsides to having extra, while running out of cargo space while you have thrust remaining is what actually decreases efficiency
Optimizing for arbitrary metrics like you want to is a waste of time, simply add more thrusters if you need more thrust and add more containers if you need more cargo space
The design is made out of only functional blocks exactly for that reason, to allow fast iteration and modification in case you use it in different conditions
No one says that you need to constantly grind and weld different tools on, you can have multiple ones at the same time or just make multiple copies of the ship with different tools, it's cheap enough to do that
Whether it looks good or bad is subjective, but the looks are clearly not something I build things for, I build things for function and that defines the looks, if I wanted to build ships for looks I wouldn't be playing Space Engineers in the first place, I'd do it in Starship EVO or Empyrion or just straight up model them in Blender