Oh yeah, well mescaline contains oxygen! So does LSD! So it's obvious that oxygen is the "dangerous" element that gives both their hallucinogenic properties! Soon, Brackhaven will criminalize oxygen use in Seattle, which will spread to UCAS legislation. Then you'll only be able to get oxygen legally in CFS and Aztlan. But CFS will "increase the levels" so everyone will be using ozone, and Aztlan (Aztechnology) will attach RFID to each one so they can monitor use and adjust sales accordingly (while monitoring every place where you use oxygen)! Of course, it's accessible to the young which will lead to "oxygen babies," children hooked on the stuff from the womb. It's a bleak and dark future.
[snapping back to the actual conversation at hand]
I'm not sure if adepts-able-to-astral-project was removed due to game balance or not, but my hunch is that it was a "style" issue. However, with tantric yoga (physical) adepts, it would seem that astral projection would fit with their idiom...as well with Native American warrior castes' spirit journeys (back to the mescaline topic). I like the idea of it being a metamagic path.