We are also having issues with the speed. Not only are our patients getting frustrated with how long it takes to get a response back when scheduling an appointment, they are scheduling their appointment TWICE since they don’t think it is working. So, they are doubling the amount of appointments in our database and only making the problem worse.
A global delete option is needed. When can we expect it?
In the meantime, could you provide some guidance on using the shortcode? There are a few of us users here who are not sure how it works and, if this is the only solution (besides messing with the PHP – not an option for us) that is available right now, we need to know what we are doing.