Secondary sorting on invoice transactions
This is probably quite a niche wish but perhaps(?) also something easy to change.
I tend to include a lot of reimbursed expenses in my invoices that post to a "reimbursables" account that I reconcile to "$0" to ensure I didn't miss anything. The date of the transactions from the invoice appears as the invoice date (naturally enough). Even though if you show the split transaction all the entries appear in chronological order as they were entered in the invoice, the individual transactions as they the account's register appear to be sorted alphabetically by the invoice entry's description.
In the register, it doesn't matter that much—where it's a bit of nuisance is in the reconciliation window. It would make reconciliation simpler when there are a lot of transactions if they were secondarily sorted by the invoice-entry's date (if it exists) before alphabetically by the description. That way, both the left and right hand sides would line up nicely.