With the accelerated shipping schedule of Dawn of X, rotating art teams are a guarantee for these new X-Books.
The more normal approach to rotating art teams is that the entire art team rotates. Pencillers get paired with their usual inkers and their usual colorists. Other series, such as Uncanny X-Force, make an effort to have the same colorist work on all pencils; and when that wasn't strictly possible, effort was made to have the fill-in colorists match up with the established style.
A good example of an artist that tends to be in the former camp is upcoming X-Men artist Leinel Yu. Almost universally, when Yu joins a book, his work is colored by Sunny Gho. When Yu leaves or takes an issue off, so does Gho.
House of X and Powers of X, meanwhile, shared a colorist team between two different pencillers.
What approach do you prefer?