From a priest:
There is a big debate happening among some of us concerning the vesture for the Liturgy of the Passion on Good Friday. On one side the camp, there is the argument that ALL priests in attendance should vest in chasuble, as if for Mass. I am in the camp that argues that there is no need for that, since there is precisely NO Mass. Hence, the “celebrant” only needs to vest while the others can be as in choro. I see that the Liturgy at the Vatican uses this model; while the liturgy at Westminster Cathedral preferred the former…. What say you?
It isn’t Mass. There can’t be concelebrants in the same sense. There seems to be no reason for anyone other than the sacred ministers immediately concerned with the ceremonies to be in sacred vestments.
Let all others be in choir dress.