A joint account makes your financial management as a company easier. You can track all of your business transactions in one place. Expenses will be easier to categorize in one account. You will have shared access to how much you have in your cash reserves which helps inform your cash flow; plus, your taxes will likely be easier to compile for your accountant.
Remember, separating your business and personal finances is a crucial piece of your company’s financial management, and setting up a business joint current account is a good step.