Frank Senn makes an interesting comment on variety in the Western liturgy, suggesting that the confusing variety in the liturgy led to the development of a distinct – and much simpler – popular piety.
The most characteristic feature of popular devotions such as the rosary and the Way of the Cross is that they are repetitious and unvarying. The penchant for variety, which characterizes the religious professional (e.g., the monk or member of a religious order), does not excite the ordinary layperson. It may be that one of the features of Eastern Christian worship that has ensured its popular character is that, unlike Western liturgy, is not only highly ceremonial but almost unvarying throughout the church year. The consequence is that in the Eastern church, there was no rift between liturgical spirituality and popular piety such as occurred in the Western church during the Middle Ages.
– from Christian Liturgy: Catholic and Evangelical (Minneapolis: Fortress Press, 1997), pg. 239
I made my own comments about variety in the liturgy some while ago, wondering if seasonally-changing liturgical texts were unhelpful in forming the faith of Christians – Variable (or Vagarious?) Liturgical Texts.