I was familiarizing myself with the parish missal today when I noticed that our priest had gone through and edited the Collects and the Prayers over the Offerings/after Communion. In general, his changes simplified the vocabulary and structure of the prayers. For example, he excised almost every relative clause. (Changing “God who reigns forever” to “God, you reign forever.”) A few edits removed calls to discipline and softened the tone of the prayers.
Is this sort of liturgical tinkering allowed? Is it common?
Is there anything I should do to address it?