As a priest who has two sizable parishes and a small financially struggling school, I offer Confession at one of the churches once a week and any time by appointment. I find it amusing that some folks think we padres are machines that are not supposed to get tired, wear out or burn out. In addition, if only, like St. Padre Pio, I could figure out how to bi-locate. All I ask, pray for many holy vocations to the priesthood.
While acknowledging all you say about priests being over committed and spread too thin, please do not forget that many people find confession difficult. They require anonymity to muster the courage to approach the Sacrament. Confession by appointment does nothing to encourage such penitents, who frequently need the Sacrament as badly as anyone.
The irony is, if you, the priest, look like you are burning out, who, after looking at you, will respond to their calling to the priesthood?
Keep on chugging, and remember to express your joy about the really wonderful parts of your job, so people will be attracted to it, and ponder a calling.
Thank you, Father. Your request is added to my prayer list. Easter blessings!