This was my first Apocrea event, and even though it was fun and the Harvester is awesome, I felt like it was too predictable: when you stand on the party button at the first depth, it's like "Oh no, what is happening, this is totally unexpected and I really didn't know this would happen-_-". So the idea is to make the event less predictable, similar to Dark Harvest.
First of all, the prestige mission won't be repeatable anymore. You can do it once a day to make sure you have some guaranteed tokens, but no endless mission farming anymore.
In exchange, the "totally unexpected trap" will now appear in the clockworks. At every party button the creepy tentacles might appear to pull you into the depth to the Obsidian Nexus (and lock the party). From there on the event will be the same, except for that the cost of the items will be decreased as the number of Apocrea levels will be decreased.
It doesn't have to be exactly this way, but I think it would be good to somehow make the event more dynamic and less mission farming.
-1
Too lazy to explain why right now, will do it later.
Except it will probably be explained why by others before then.