“Ability to change client when editing invoice or quote” -> will be added to --v2-- v1 > IP-200
"Change name of “Invoices Group” to “Sequences”" -> I think ‘accounting group’ would be a better term.
Actually invoice of PDFs should store somewhere when invoice is made, so it will be unmodified even information about the company changes (like address of the customer or even ours). Legally is usually required to keep the document unmodified.