It looks like Manager users have been asking for this improvement for some years now.
march_2013 update-prices-on-invoices-idea
may_2014 automatically-update-prices-in-inventory-item
March_2015 prices-and-recurring-invoices
April_2016 price-increases-in-sales-invoice-items
It doesn’t seem reasonable that for users of recurring invoices, so much work can be caused by a simple change in the price of an item.
@lubos , what are the chances of adding the ability to auto-update the prices of items in recurring invoices or of adding a batch-create function there?