How can we improve WHMCS?

It should be great if we can be able to define for bundles discounted price depending on the billing cycle.

For example :
Bundle A
- 59€/year
- 107€/2years
- 149/3years

Right now, if you choose in the drop-down menu a billing cycle when you create the bundle, it does not work.
It's written the docs here : https://docs.whmcs.com/Product_Bundles and in our dashboard "Choose the required billing cycle" but in fact it just select it has "favorite" for the order.

The customer can change the billing cycle when ordering (but the price didn't change).
They can't buy it if t's not the correct billing cycle.

It should be better if there is no "error message" AND it should be better if they just don't see the other incorrect billing cycles.