In regards to Ticketer, if paying by card it seems to vary by operator at what point you should put your card down.
There's also the delay because you have to wait for a ticket (or tickets) to be printed. Given they're flat-rate singles, you don't really need a ticket unless you need the receipt for tax purposes, or in case of a ticket inspection (how many bus companies outside of cities do these?).
Given it's temporary, even if extended, I suppose there's no incentive to change anything to make it quicker.