ergoth

My guess is that they fixed it too well.
If you recall, last time we had this event, all levels of Ergoth dropped the boxes.
Now, they must have tried to fix it so only the right level range will do so - and broke it entirely in the process.

So not looking forward to trying to farm boxes with the entire 150+ population of four servers crammed into a few ToT maps (all full of botters anyway).

That is entirely possible and you're probably right.