Just a thought I had. How sweet would it be if blizz made a questing mode in this game and made the “main boss” of each questline like a delve boss with its own unique mechanics and difficulty’s. It would be a big undertaking but I feel like it would bring people back to all the old zones. Especially if they offered transmogs and mounts and voiced the quest lines.
They could do something like Rift’s Instant Adventures.
You’re queued with people to run around the zone, get a quick feel for the storyline, do some quests that are automatically given to you for that area that work kind of like world quests, and at the end, there’s always a “zone boss” to kill. Then you’re ported to another zone, rinse and repeat for as long as you want.
It was fun leveling. It got you currency and some lowbie gear. Sometimes cosmetics too.
I feel like this article doesn’t do the best job of explaining them, but they are pretty awesome.
Oddly, via quests I learned about a new main boss of my delves, so I am not really understanding what you want.
I’m talking about making the zone quest lines
More difficult. And the final boss of each questline in each zone have unique mechanics. For example hogger. Or the giant fish in stone talon mountains. The wanted quests are just an example.