Some Vault Improvement Ideas

I feel like the vault was one of the smartest ideas yet for a new feature, but I also feel that Minecraft should change a little bit about how the vault works. I feel that a vault should be able to continuously be unlocked instead of a one time only. I also feel that the vault should be another unbreakable block since the reason the vault came to be was to have a place where everybody could loot, not just the ones who got there first. But if someone destroys the vaults, then whats the point in that? However, I feel like that issue should be fixed if Minecraft changes the vaults to be a multiple use thing per person since there would be no reason to break it. I do know that it will cause a lot of farming, but i just found a trial chamber in the Minecraft Preview and I'm left with 5 trial keys left over and I can't use them. So now they become useless. I know this is a long complaint but I feel like this issue should be addressed in some way shape or form!