Ok, so this time we are trying something different. We are now live with 1.17.1 and the darklands are still around. However, we will reset the darklands end of August. So you have basically 6 weeks time to demolish whatever is in the darklands and we will reset/wipe the darklands to make room for all the new crystal caves!
Please let me know if something does not work. To my knowledge everything except the 2D map should work.