Support charging saved cards
The Stripe API allows you to pull the last four digits of the card the user used just previously as well as a token for that card. This allows you to offer the user to use that card for their purchase, avoiding having the user enter their card details all over again.
For sites (like ours) where users make many event registrations over a short period of time, this would be a huge user experience improvement.
My users have asked repeatedly for a "save card" feature. While a save card feature a la Drupal Commerce would be a larger implementation effort, grabbing their most recently used card and offering it to the user is a much smaller/more doable improvement.
We have previously discussed making this improvement as part of the code changes for the Make-it-Happen campaign, or making the code change during the coding timeperiod for that campaign but under separate funding. Hoping that can still happen?