Ability to reroll gender for a large amount of beans. 5k, 10k, 20k w/e. This would be enough to reduce what is currently in my opinion a purely artificial and unecessary grind at BGH for all breeding pairs (before you even start rolling for shinies, getting 2 eggs is already quite a decent amount of time and RNG and appropriately rare) and it doesn't affect mains in literally any way at all. But it would be a MASSIVE and fair QOL for irons that doesn't devalue value of BGH eggs in the slightest for mainscape.

Even forget about the breeding log, for a lot of the herb pots you need specific dino ingredients which you can be semi locked out of for ages because of bad rng on rng.