I would not even go so far as to say that Rachel advised Ororo, more like she simply made Storm aware of what was going on outside the hospital with the protesters. After that, she merely stated the obvious about whatever Storm was going to do would affect those outside. Of course Storm would have been hip to the fact of her handling the situation improperly could have a negative backlash on her supporters out on the street once she was made aware of their presence. This was just Pak's way of letting the readers know this while writing some fun dialog between the two characters. Rachel never advised Storm on any course of action. Storm took in the situation and came up with a course of action on her own once Rachel made her aware of that detail outside. Rachel then took orders like a good little soldier and, alongside Nightcrawler and Beast, proved to be helpful to Storm.
All in all, I did enjoy the Storm/Rachel interaction in this book as well as Storm's dialog with both Kurt and Beast.