First the most important thing. You took half my fun with the change of the Cyclone mythical. I was having a blast running with my warrior sucking everything in like a moving meat grinder. I am still not over it.
I dislike the fixed Sanctuary, it was good while the bug lasted but it was clear devs would figure it out.
Otherwise I love the game, the variability of options and the very different styles you can use to whack stuff.
Eternals are a sad joke. I have found dozens and I use zero.
The feats to get 500 crystals and 500 mythstones don’t appear affected by anything (like being on a red map, wearing mythical/crystalline set): if I get two wisdoms or beryls out of the 25, I feel lucky.
About the red maps - I have never noticed any increase in quality or quantity of crystals or stones dropped. This advertised 1000% improvement feels like just a marketing trick.
The reward for using 500 crystals is heavily biased towards the beryl/jasper end. Is there any chance to make it lean more onyxwards?