As far as I know on my Modded Voltz server you can use worldedit //replace *block id* or if you have access to the files use a external editor like MCEdit.
Worst comes to the worse, delete the region and restore edited blocks through rollbacks if you have core protect.
After spending some time with it, the home screen makes nice visuals such as the Steam app where you can pin games onto the homescreen, plus the 'snap to' function is more fluid with apps such as Netflix. I got used to it and not to mention the added FPS in Battlefield 4 through DirectX 11.2.
If this was my server I was paying for from a 'decent' host, from my experience they can block the ip/port from where the large amount of packets are coming from. I would have a chat with your provider.