Deliveries in ours are, for the most part, too long.
Getting F/T to do their full hours might save a little o/t sorting on a morning,(perhaps starting a little earlier but still finish their cushy delivery on time) but there remains the problem of people (usually P/T) cutting off/booking protraction.
Perhaps our office isn't typical, how would I know?, but I don't see hours and hours of free time, enough anyway that would make a substantial difference to the office budget.
We have hundreds of new builds that haven't been accounted for in duty spans, and maybe a couple of thousand more in the coming 5 years or so.
So someone, somewhere, is going to have to get their thinking cap on.