FYI: i haven’t forgotten, just trying to figure out something else – though unrelated – that might be helpful to some
I would think an update will be available to the stripe plugin in the next couple of days that will add the email address as description there (as you mentioned)
PS: if you use the stripe redirect option it will always also add the email automatically in the “customer” column btw, but of course this is irrelevant if you use inline payments. just thought i’d mention this here in case others come across this thread.