Ancient City upgrade

i have an idea what to do with the portal in the ancient city. First you have to kill the Warden to get a key or a Special flint and steel, maybe you also find it in a Special chest or anything. Whatever if you light the portal you dont get to a new Dimension, but you get to the end. Not the Enderdragon island, but a normal island far away from the Enderdragon -island. The Not ancient city isnt destroyed. It is full of new mobs wich make the Game more interesting and give the end a new feeling. Maybe there I a new type of Villager or a trading block that is not supposed to give you emeralds but other things like spawn eggs or something like this. 

Best regards VampyWolf689