It would be great if the Expense Approval Path could be customized based on field values. For example that an expense only passes to payroll for the approval if it is marked for Reimburse.
This can be achieved with a customized expense conditional approver rule, I will have our support team reach out to you about the same, in-case if this isn't possible with a customization then i will forward this to our product management team as a feature request.