I have ventured a bit in the End today and have some info that might as well be shared with everyone. The picture shows a funny generation bug at a Stronghold.

1777, -1555 are the coordinates for the Stronghold. There is some loot left there. 3 fully explored End Cities located at 3245, -285 / 4270, -580 / 4550, -1510. You’re lucky to even find a single shulker at those locations. Only 1 Elytra was found.