the black and white texture pack seams to have some issues with the animations. if you make more texture packs in the future I would suggest theming them to make it more unique 😄
it would be horrible on the server performance but what if for every block in a draw op you could preform another draw op. you could do thing like make thicker lines or round cuboids with spheres
Could you make a nudge/move command where you select and area like cuboid, then using the arrow keys/command hotkeys you can move the structure until you deselect it.