Hi, I’d say that these fit better in the feature requests forum rather than the customization options forum. Also please be sure to separate your ideas so people can vote for them separately.
As for your ideas themselves, I feel like the usage of crystals seems beyond nicheling capability but I’d like to have decorative crystals I’d cave biomes ever become a thing like in these posts:
For reptile genes, I’d point you here:
And as for the dragon traits, it seems like you’ve already suggested them before so I’d suggest editing that post. I think that breaths could potentially work but they’d definitely need to be balanced well like with cool downs and range. And dragon snouts should have less than +4 smelling especially if they have breaths since that’s higher than any snout currently. I’d think you’d be interested in the post considering the breaths as well: