The alteration "spirit projection" also known as "astral projection" has has some changes to how it works.
Specifics aren't available for number crunchers to chew on right now, but here are the basics:
This alteration was intended to be used as a way to scout ahead for mages, when no scout was available.
It was instead used as a vastly superior form of scrying , instead of actually scrying.
This was very hard to balance two entirely different mechanics around and so, the spirit projection spell has been altered to fit it's intended roll more closely.
Using your projection to go into areas with npcs in them, is no problem, and it will work how it always has.
Trying to project near player characters now has a save involved, even without a ward (though wards greatly increase the difficulty of the save to retain the projection, and allow warded characters to pull your name from your mind if the save is critically failed)
This save will be rolled every 6 seconds, and each time, become slightly more difficult to pass.
The result is the spell can be used for scouting on quests and dm events, or exploration, but is too weak to get much more than ten to thirty seconds of "spying" done.
Scrying is now VASTLY superior to spirit projection for the purposes of spying.
This makes it a lot easier to make any future alterations to scrying to balance it, and make it useful for roleplay, and not an I win button.
!!!MOLES for the MOLE GOD!!!