I'll get straight to the point, my suggestion is that when you attempt to delete the core of a ship in build mode, or a group of blocks containing the core, you message box would pop up, like when you normally try to destroy a core without any other blocks on the ship, and you will have three options: Destroy the blocks that are not the core (for when you try to delete a group of blocks and the core is one of them), destroy the whole ship, and don't destroy anything.
This would make it easier to delete ships, especially big ones, since you wouldn't have to go around deleting every block and making sure not to miss any.
This would make it easier to delete ships, especially big ones, since you wouldn't have to go around deleting every block and making sure not to miss any.