As Brian pointed out, a comparison between a minor and major league team on lineup construction is apples and oranges. There are different goals and circumstances in running each team.
For a major league team, you hear players say they prefer having a set position in a lineup. Plus consistency generally means success. A lot of tinkering and changing generally means you are trying to find a successful combination. Plus I believe a lot of changes hinders success to some degree. In most any endeavor, when you never know from day to day or week to week what you will be doing or where you will be, it is hard to gain efficiencies and get into a rhythm of accomplishments.
Sometimes all the changes comes with the job, but in baseball you really want a steady environment at the top level.