I noticed that with the new built-in domain purchaser, there is language that says "X price for the 1st year", but there's no way for us to customize pricing outside of the rebilling slider in Agency settings or give discounts to customers.

I'm sure this is on your list, but please give us the ability to customize domain pricing. We could have set pricing for different TLDs like $14.99 or 19.99 for .com instead of the rebilling slider, and we could offer discounts for the 1st year if they purchase multiple years at one time, etc.