Some of my thoughts about new quest:
Killing usual dragon is pretty easy even with midgame armor, lets say netherite armor + supremium cleaver. Maybe wyvern tools are too much for the heart?
Chaos shards, its cool that there is alternative, but imho id like to just fastkill dragon and get 10 shards, other than crafting this amount of items. Maybe its possible to decrease item types needed, but increase their amount. Like 1 shards - 1k awake blocks or even more. Most of us got awake seeds, so its pretty easy to get, but it will need good amount of pots and time to get to that point .
OOoor, making some kind of taxed teleport to the new Chaos Islands, so no tons of new chunks generated + happy players than can pay and tp to chaotic instantly.