Apart from the Gold and EXP rewards being broken, as mentioned in this post, As of mid day today, the chest at the end of Overlord's Den 8 is now dropping Common and Rare items as opposed to the usual Epic and with very low rate, Legendary.
I do strongly hope that this is a bug which will be fixed with a matter of urgency, as if it is not and it is intended, then this is a major blow to anyone who wishes to play without buying tokens.
Before this, Overlord's Den 8 was the only way that one could gather items that come exclusively from Premium boxes. Items which are mandatory of any type of competitive or otherwise gameplay. Without said items, one would not be able to devise decent builds to progress throughout the game.
Could this please be acknowledged and addressed as soon as possible?