When people are dueling movecraft in the creative server, it is almost impossible to not collide with debris from shipwrecks, run aground on islands, or have players flying around and snooping at your ship or being a distraction.
It would be nice if, similar to hub duels, the creative server had several locations that you could duel another player in for different craft types (boats, planes, tanks, etc) without distractions or obstacles. This would be done with a command that invited someone to duel, then they can go and copy whatever craft they want to test and accept the duel, pasting it in the new arena. The arena would be reset after every duel.
This idea is not meant to get rid of the existing arena, as it is a perfect location for people to simply test out their vehicle on their own or to have large-scale battles. This is meant for 1v1 duels where movecrafters will be able to focus all their attention to the battle.
Suggestions for dueling maps:

"Top Gun" Canyon
Urban Warfare (20th Century)
Japanese Village (1945)
Open Ocean
Snowy Village
Rocky Shores
Normandy Beach (France, 1944)
Verdun (1916)
Reichstag (Berlin, 1945)
Train Tracks (1943)
Stalingrad (1942)