I would love to see a "pity system" for DoD and rolling for mutations. There have been people rolling hundreds of nests (not eggs, but nests - me included) without getting a mutation out of it. I understand it should be rare and it was intended to not force it, but I think by a chance of 1/200 eggs there should be a pity system. Make it that it does count up to 200 eggs per dragon species you nest, or even per single female dragon and then you have a guaranteed chance of a mutation dropping.
The current state of the game is, that people brute force the mutations because there is nothing else to do. With Shadow Pc being disabled now too the numbers of players has dropped by a decent amount and it is even harder to nest by yourself. Everything combined I think there should be a pity system so the level of frustration does not rise and you can actually work towards something.