I have in mind to complain about Liturgy which has just one Minister: the celebrating priest. I call it Monoliturgy. But a couple of caveats:
(1) I am not attacking 'private masses', in favour of which I have recently blogged, or guild masses, or ritual masses such as those at the conferring of sacraments or at funerals , etc. etc.. What I have in mind is the main corporate Mass of the Lord's People on the Lord's Day. Which ought, in my view, to express in the involvement of formal ministries its corporate and very special status.
(2) This has nothing to do with sacerdotalism but a fair bit to do with clericalism. In the centuries after the Reformation, the C of E was repeatedly nagged by Puritans and Presbyterians to make its worship more of a clericalist monologue.
We have an account of the ministry of an ordinary North African town in 303. We learn of Paul the Bishop; of Montanus, Victor and Memorius his presbyters; his deacons Mars and Helios; his four subdeacons, and a considerable squad of sextons (Dix SL 24). Clearly Sunday Mass at Cirta was no Monoliturgy but a corporate 'performance' involving a diversity of ministries which were clearly not informal or ad actum, but formal and structured. But a normal Sunday Mass nowadays may have a deacon - if the parish is lucky enough to have a transient deacon preparing for the priesthood, or a 'permanent deacon' - but in the great majority of cases, although various laypeople may read, or intercede, or serve, or sing, or (extraordinarily) administer Communion, there will be no formal ministries involved except for that of the Priest. True, an Oriental Liturgy ought always to have a deacon; but in my experience Orientals in the diaspora often cannot afford a deacon. A priest, of course, is necessary for there to be a Eucharist.
Together with the almost mandatory deacons, what used to be called the 'Minor Orders' supplied the rich interaction of ministries which characterised worship in the early centuries. But they turned into mere stepping-stones for aspirants to the presbyterate and have now disappeared. Or have they? More on this shortly.