We have. The main thing that was done was to make sure that we had the ability to scale support capacity up as queues increased by having different options to increase capacity. I’m sure somebody from the support teams can chime in with what exactly these options are. 
This situation we’re in right now is fairly unfortunate (marketing push plus Faster Payments outage plus some merchant issues all in one week) but from the dashboard we have in Card Payments (we often use support numbers as customers are usually the fastest to tell us if something outside what we can monitor is or is not working such as payments at individual merchants), it’s coming back under control.
If you do require immediate support, please remember to mark your message as urgent. Wait times for urgent conversations are currently roughly ten minutes.