I think the keyword here is "expect" rather than the actual approach method, it's all about preparation and i think knowing beforehand the approach you can expect is always good to know information surely? It's more so useful for traffic that may not be familiar with the area.
Things can change quickly and instantly and we need to be prepared for anything so knowing an ILS approach to runway X can be expected means the flight deck can prepare for it.
The purpose of ATIS is to provide information and a status report of the conditions being experienced by the airfield so knowing as much information as possible allows the best preparation.
As the saying goes, if it ain't broke, don't fix it.
Last edited by blue_ashy; 3rd September 2012 at 15:11.