I like your sense of luke-warm caution.
I do hope your words above, DracoM, were not loaded with too much irony - or even sarcasm. I prefer to be cautious, partly because my own musical knowledge and experience are limited - surely all our words about music have their limitations? - but also because ---
---(1) whatever sounds may emanate from a CE, they presumably represent the very best that the choir can deliver 'live' after much hard work. Our cathedral choirs exist on a knife-edge: they are financially vulnerable, they have recruitment problems, they are close to over-worked, they often depend on the commitment of the very young. It would not be unreasonable for a professional critic to be harsh over any commercial enterprise by such a choir (eg a CD), but any amateur assessment of a daily service should surely take into account the problems. I am not absolving any dishonest judgement in a 'private' forum such as this, but merely suggesting that all factors be taken into account. Sometimes kids are bussed in from suburbs to sing Byrd: is it useful to comment they are wasting their time? Would we really rather they stuck with rap?
---(2) performances do not have to be perfect to serve the composer's intentions. An off-topic example: today I listened to Opera North's "Peter Grimes"; it did not match up to my LP recording with Peter Pears; even so, I sat transfixed indoors on a sunny afternoon, close to tears throughout Acts 2 and 3. Great music has its own momentum, and needs only a fair (ie appropriate, workmanlike, largely unblemished) performance to work its effect. Similarly, I find the music in CE invariably enhances the service. To that extent, it always merits a certain level of respect. Therefore any critique of performance standards has to be shaded. Personally, I start from the standpoint that we are lucky CE happens at all, and extra-lucky that it regularly happens so gloriously well. I am absolutely convinced that all church musicians are striving for the highest possible standards -- it is probably a religious issue for them! Thus I condemn only with the utmost reluctance.
Well, there's a viewpoint. No doubt I'll be ignored or flamed --- again. But I would welcome discussion.