So. Give us XL Atmo Engines and [XL | L] Stabilizers. Adjust the stats for those, so there is less elements to loop and the game will certainly run better with only that.
You know very well that this is a very easy thing to do, NQ.
The visual improvement
Focus on the very important things like the above, that would very much benefit on the performance side.
Fix or improve the network code (desyncs) that breaks the overall experience and immersion, and not only that, it make PvP not fun and very difficult to play.
Make some kind of survival mechanics, since you care so much for realism, although it's a game, and should be fun to play.
To say that would be unrealistic the give a tool that vanish all voxels and elements from a construct is absolutely absurd. IRL, we use demolishing with C4 and all kinds of stuff. The building vanishes and that's real. So, make an FX before deletion and return the material to the players inventory, and there you go.