It’s either keep it the way it is or just do away with divisions.
People keep wanting to tinker with something that isn’t broken and doesn’t have a viable alternative that makes any more sense. Swapping SLC for Phoenix is about as clean as it gets, why would that change make any difference at all? If anything the Central is now slightly even more sensible because it is all Central and Mountain time zone teams (with daylight savings) - as opposed to Phoenix being an hour “off” (Pacific equivalent with daylight savings) in March and April of the hockey season.