Good advise is always to have a backup processor (similar to ESP). The thing is while initially regular MSP may not want to do business with you, if you get Stripe account in somewhat good standing for 3 months, you will have hard time finding MSP that will not accept you to process. Once you have 3 months with Stripe, which I imagine you didn't start with tens of thousands of dollars in processing day one, get yourself another MSP which should be top priority. Either have your system split 25% second MSP, first the rest, OR if you are unable, at least do few "test" transactions a month to make sure your backup gateway remains open. Without backup sad thing is that its irrelevant whether Stripe had standing or you got suspended as an error - the bottom line is you cannot process and that hits your bottom line.
Hope this advise helps someone going forward.