It would be more than important to get all fields mapped to be able to use them on reports.
It does not make sense not to be able to have business reg. numbers, VAT numbers (required by law), sell to, ship to contacts on quotes, orders or invoices.

Same goes with service management. Not being able to show service items, serial numbers, contract numbers etc. on invoices is limiting.

Is it to give more business for Microsoft partners so they can develop these fields for their customers or can we expect MS will sort it out near future? All fields available should be available for reports as well.