The issue with Multiplayer Structures

There are a few subjects I want to touch on in the Issue with Multiplayer at this current state, focusing on Structures. 

Elytra:
Elytra are one of the most powerful items in the game, and are only found in end cities which are really hard to find as they are quite rare. In multiplayer, especially larger servers, every end city within like 20 thousand blocks from spawn are looted. It doesn't make it any better that not every end city has elytra.
This can be fixed with the new Vault block. In end city ships, place the Vault block where the Elytra would be. Now, it can either be opened by the normal trial chamber key, making the trial chamber actually important for progression (right now its optional), Or.. it can be opened with a special key you get from end cities either in end city chests or dropped by shulkers or something.

Smithing templates:
Similar issue, every bastion in the nether is looted in the first week of any server existing. It can be fixed by making piglin brutes rarely dropping them, or "template shards" (which can be made into templates) or with Trial Chamber Keys / Bastion keys from Piglin brute drops or bastion chests.

Even for both of these, adding Ominous Events to bastions and end cities would be great, so it can be done so you can only enter either of these structures with Bad Omen to get the Elytra/Template