'grouping' a single move and maintaining delegate_to (reconciliation)

As I mentioned above (and in One Payment for multiple Invoices), standard payments with compensation accounts need to allow compensation accounts to have party_required . Also, delegate_to needs to be used.

If this were the case, then perhaps grouping in the compensation account is possible.
But notice then that grouping is an manual extra step that should probably be dealt with directly in payment and payment group (perhaps a special case of manual?)