Formally making this a suggestion (I know you're busy Krin but if you ever get the chance <3)

Mass release button is life changing and I love it very much. Since this feature exists, I'm guessing a "Hatch All" feature wouldn't be too difficult to implement.

Would love to have a way of dealing with this that's not just waiting for the autohatch


And since you mentioned the issue of nothing having room for this button, might I suggest placing it where the "Release" button is? It can be there when mass release is disabled and replaced with "Release" when mass release is enabled since you'll never need to use both of them at the same time.

Support! Hatching a large amount of pets is tedious. Maybe for this you choose one of the three hatching options (including philters) and it applies that option to all the pets selected? I don't do breeding projects often but I'd imagine that could be very handy for them.

This would be great if/once Krin is able to add the option to pre-select philters for hatching. Then you could assign philters to eggs that need them, then just hatch everything else in the mass hatch with one of the normal hatch options~ Definitely support ^.^