I only change my hotbars when the skills change. Otherwise they all follow a very common theme and pattern which works across jobs within roles. For instance all my flank/back positional skills (yeah there's not a lot anymore) share positional buttons on the controller: Dpad right, or Dpad down. This way whatever DPS i'm playing that uses them I can be sure I'm doing it right.

So pretty much I only change the skills when the Devs change them such as when a new expansion releases.