C, UC, and R don't play much of a role in the game. Neither do epics, really.
We have eggs in our inventory and we all know we will never put them into hatchery due to constant events and constant new L monsters coming out.
What would be the harm in letting us instantly hatch those eggs so we can at least extract and rank up some of those weaker monsters? No impact on game since we won't even use them in battles, but will let us clear some clutter out of our inventory and maybe complete a book or something.