I really enjoy exploring them by myself, figuring out the mechanics and trying out all the paths. I understand it didn’t land with most people due to the underwhelming rewards but the idea behind it is really fun.
Now, I don’t think they are a replacement for explorarion zones or anything, I just think they should come alongside other pve content in the next expansions.
The savage version is a bit lame though, no new mechanics just a time limit, they should really add something to it that’s actually fun. Mqybe something like special weekly effects that make it easier/harder/different.
My only suggestion would be that if you are going in alone that they adjust the boss health down a bit. I’ve been in there by myself fighting some boss for what seems like forever.