This will be an improvement but it will not solve the case to schedule multiple payments in a bunch This is usd for example when requesting advancements of SEPA payments as you normally send to the bank all the payments of the next month and request it’s advacement but can be used also to create all the payments for lines that are due in a period.
For me the best will be to make the PayLines date optional, and use the line maturity date as payment date if the wizard date is empty.