One of the big things I'd want to see in a platform that links all my finances is a way to see if I have enough cash in my checking account to cover my bills for the month. Currently, Simplifi can be used to create recurring bills and transactions. This is okay for bills that don't change, like subscriptions. However, for revolving credit lines, the statement balance changes each month.
I don't want to make a recurring bill for last month's payment. I want to see my current statement balance and the due date. It seems that the current total balance is already imported from each bank. I'd suggest importing some more information from accounts that would make the upcoming transactions list more useful.