Stuff like gesbroy, Tooki on off hours , Lullaby for secret map , some world bosses islands… or any isalnd in general that has a “one and done” type of system?
Its not even inventing new tech you can just lower the number of points/participation a little bit… some of these are not doable anymore due to old players finishing them and no reason for them to go there anymore.
Probably not it’s not high priority. They only do things based on high demand and adventure island nerfs are not in high demand only new characters and Legion raids.
I.e. they will only prioritize things that can make them money which is vertical content.
remember that time when they said they don’t have team working on x day so emergency patch cannot be done for y matter, but at the same time when cash shop had issues we had emergency maintenance with 10 second notice? and that pet chest being more expensive due to “bug” stayed for few weeks?