I understand this is coming in a later revision, Any Kaseya people with an update on this as we too need it and obviously connected to servicedesk - additionally we would like to see new tickets stopped if hours have been used.

this is indeed the TOP1 issue for SB1.1 (i don;t know a timeline for that)

Yes, this functionality is being  considered for Service Billing.  We have not yet established an ETA for this functionality.