We are looking into supporting 'PayPal Business' account on W+M online store, in the near future. With that, you would be able to accept CC payments and PayPal payment on the online store. Consumers need not leave the checkout, to go to PayPal to complete the CC payment. They would be able to enter their CC detail on the checkout, just as it is for Square or Stripe. I think this is exactly what you are looking for. I don't have a firm ETA to share with you, at this point. But, please stay tuned and I'll share the details soon.
When might this be implemented. I continue to lose sales and have customers complain about this checkout process. Here is a new complaint I recently received: