End gates for dungeons (structure/mechanic)

On the end islands you can find gates (five blocks high, four blocks wide) as a new structure. The gate is rare. If a gate is activated you basically enter a end version of the trial chamber. These gates need a pot to activate. You find pottery shards in the end - so not the normal overworld shards - and craft them to a pot. The pot is placed in the corner of the gate and activates the gate. The pot in the gate breaks eventually if you have entered the gate too often. You see the pot breaking down with use. When searching for gates you better use binaculars. 

• TLDR: Gates in the end that leads to trial chamber experiences and requires a little archeology 
• So in total you need: A gate, end pottery shards and an end pot
• The post is not about the experience in the gates but rather the gates as a new structure/mechanic.

Contextualisation: Whilst the overworld is the core, the nether is a fast travel dimension, the end could be a battle and exploration (through archeology) dimension.