They lost enchantment.
Ah thanks. Thought something might have happened to make my current guy illegal now.
They lost the least useful magical skills? Wow, how is this a nerf again? Take away their spirits instead. Jeez. So a mystic adept cannot make a magic sword, but they can summon spirits to negate the penalty of losing astral projection.
Tangent for @Reshy: Run Faster (p. 141) says: "An Infected character’s aura always reveals its Infected nature, though this may be masked by metamagic as normal." This implies that 1 hit would be sufficient to identify an Infected character. The fluff of Run Faster supports this, as it talks about how obvious it is when Essence Drain taints the Infected's aura. That said, I often house rule this to match your interpretation.
Back on topic: Is there a street date for a print version of Forbidden Arcana?
Well I guess they changed it, previously it took 5 hits because HMHVV is a disease. Mainly because with certain infected, like vampires, they're often human-looking and are intended to blend in. Otherwise you don't really need to assense a ghoul to see they're a ghoul, they already look the part.
Still though, it causes issues the way it's written, like being able to see if someone has a SIN or not, or if they're a latent drake (which only great dragons are supposed to be able to see).