We have a customer looking for the Braintree Payment Gateway to validate the expiration and cvv (they see it on other shopping/payment sites).  They would also like to see the ability to process the transaction and if it fails, do not submit but instead allow the user to change card info and try again.

I have seen others ask about verifying purchase before submitting/closing the form and going to the thank you page but to date I am still not seeing this functionality.  Without this, the LF Forms payment gateway experience is very poor when the payment fails.  Having to rely on an email notification that they may not pick up for days is not a good option for most situations.  Is this a feature that you are considering adding?  If so, is there a time frame for availability?