The only phasing that I'm aware of is the beastmen phasing. There are issues with phasing, so one has to be careful with it being too abundant.. but I do like me some phasing. It is fun to see "MY" work have effect, and not just be thrust changes at interval (would rather have changes at interval than no changes, but would prefer /my/ changes over at interval lol).

With some server one time content being an exception, like good expansion/dungeon release breaking the gates down fun.