Inspired by the MFA question. Here are some starters in no particular order ....
1. No invoice total column on the All tab (just paid and due), and if you need to change tabs (to only see the unpaid ones) you have to enter your search criteria again. What's wrong with filters?
2. The bank rec screen only shows 10 transactions and you can't filter or sort them
3. You can't import a reporting structure or copy it between companies for all users to see
4. It still offers Covid advice and support
5. On the "New" invoice reports you have to remember to exclude void and deleted invoices
6. There isn't an invoices by customer by time period report
7. Aged receivables report can't be filted to only show overdue invoices
8. Budgets e.g. by department can't be rolled up to report total budget
9 Credit notes don't show on the bank rec find and match
10. Not enough fields on invoice header and lack of custom fields generally
11. No EU edition (the internation edition doesn't properly handle EU VAT)