I would add one additional issue. If the pastor(s) in a church preaches the same thing over and over again it creates boredom. Whether it’s the evangelical churches endlessly preaching on end times or the hot political issue of the day or some of the dutch reformed who cannot preach on anything other than sin and misery, if we heard the same sermon in a slightly different way week after week it creates bordom. So to does the religious adherence to the Heidelberg’s 52 Sabbath’s. If the congregation knows that because it’s the first Sunday in July that the sermon is going to be about X, that strikes me as a major problem. Predictability in order of worship is fine, predictability in sermon content creates boredom.