How can we improve WHMCS?

I would like to see the new module being able to disable subscription payments, as with the old module.
We have often had the case that customers created a subscription when ordering and forgot it on the next invoice 1 year later and then paid the invoice amount by bank transfer. By the PayPal subscription payment it came so to double payments and stress with the customers.
Therefore we do not offer subscription payments anymore and hope that this will be considered in the new module soon.
The decision if we want to offer subscription payments or not should be up to us and not WHMCS.

Hi,
What about one time payments?
Does it also create a PayPal subscription?
Is there a need to have such a subscription when this is a One Time fee?

I'm not sure about the details of implementation in the current version but I can highlight an issue we had with the older module that supported subscriptions. Our WHMCS setup has 4 currencies enabled, 2 of them with quite unstable rates. Whenever the subscription was created, it was set to a currency or one of the currencies of our PayPal account. But if the currency rate was changed between the recurring charges, the final amount credited in the invoice currency could differ from what is expected. We had an issue when we had a lot of invoices marked as unpaid because they were lacking amounts equal to 0.01-0.02 eur. So yeah, I also believe that subscription should be optional.

Here's another reason.

On a single order a customer orders hosting for a one year at a time (because that is all I offer) but they register their domain for 5 years at a time. How do subscriptions handle that?

Beyond that, it is not PayPal or WHMCS's place to tell us how to run our business. If we choose to not have subscriptions, why suddenly force us into that model?

The main reason is that when I looked last into it when changes were made to the fees or services cancelled PayPal subscriptions were not changed automatically and people had to go in to their accounts and cancel subscriptions.
We have customers who have monthly and quarterly services for example and on credit cards they are just being charged whatever it is on that date and if there were additional one-off services billed they can all be charged by the system automatically whenever the due dates are while from my understanding back then that was more complicated with PayPal since it required customers actions.
If PayPal can be operated/charged the same way that credit cards can then that's OK, but as long as that is not the case I don't even want to give customers the impression that we can auto-charge services to their PayPal accounts because then they need to remember what is being automatically charged and what they have to pay manually.