Skyblock has been suggested many times in the past. If you want to, you can continue the discussion here.
But for treasure wars, spawning in with a sword is basically easy mode for those who are breaking into your treasure based on some experiments I have made. You will always kill them or push them off the edge, making the games kind of longer because it’s harder to destroy the treasure. But hey, that may just be me so feel free to correct any information.
If you want to have a feel of spawning with a sword, just buy a lot of stone swords, save them in the e-chest, and when you die and someone is at your island, you can use the sword. 