I don’t know how difficult this could be to the developers but it would be really great if you can set up an automatic account (mostly for expenses) for every vendor / supplier. For example, when you write a “spend money transaction” you have to chose the expense account for every transaction. It would be nice that you can create a vendor / supplier and assign in the setting of each vendor or supplier the expense account you would use for this particular “contact”. Maybe sometimes you would use the same contact to other expense but in most cases you will use the same expense account for every vendor or supplier, so this would make a really big difference in time for those who will enter a lot of data in Manager daily.
I know this could implicate some changes because how is Manager now, you cannot create contacts or vendors for expenses, just the suppliers for bills and invoices you receive but eventually, if this could be considered as an option in Manager, it would be really great for those who work with massive amount of data every day.