Well, prior to becoming a bishop, the very conservative Bishop of Albany (NY) took on a small-town parish close to the brink of closure and rebuilt it into one of the stronger parishes in the diocese, a vibrant largely young adult community alive with a glowing Anglican spirit. At the behest of friends in our own parish who knew them, we went to visit there on a regular basis, and had a truly outstanding spiritual experience as sort of adjunct members of the community.
I tell this story because of the annual parish picnic one year, held on the shore of the St. Lawrence River. An adult catechumen was ready for baptism, and as a gesture to Early-Church tradition he and she together decided that it would be by full-immersion in the river at the picnic. And he celebrated that baptism standing waist deep in the water wearing a pair of Bermuda shorts and a stole -- exactly right for the circumstances.
Casual garb worn out of disrespect for tradition is wrong. Casual garb worn because it's the appropriate clothing for the circumstances is the Church reaching out to people where they are.
(As a sidelight, he's also the bishop who has agreed to provide "alternative episcopal oversight" to the conservative Epispocal churches of New Hampshire, by agreement with the Bishop of New Hampshire and the dissident parishes.)