How can we improve WHMCS?

I was wondering if whmcs can be used for booking and reservations. I understand that yes it can work if the pricing of booking or reservation is fixed and does not change by calendar days.

But when such booking and reservation products have calendar pricing which may change accordingly calendar dates, whmcs can't work because whmcs product doesn't have any pricing calendar which can be used to have different pricing for different days in calendar.

If whmcs products can have pricing calendar then whmcs can be used to any type of booking and reservations.