User suggestions

Dear team,
With group bookings, if payment has not been made in full by the booker before their stay or we already have the email address from (some) of the participants, the automatic payment reminder goes to ALL guests on the booking. All will receive an email that payment still needs to be made with the amount, which is not what the booker wants as:
1 - they are responsible for the payment and not their guests
2 - it is not of the guests business what the booker pays for the group

When they go to their individual link, they will also see that there is a payment to be made. Which is confusing as the individuals are not paying us, the booker is for the whole group.

Furthermore, all email addresses are visible to all participants in the group as they are cc'd in and not bcc'd in automated emails that are sent. We have guests who aren't happy with this. 

Is there a way to streamline this process?