Not a whole lot of news here. Being able to pseudo-Predictamancy by mass reading is something new but not super scary yet. We knew he could monkey with Thinkamancy links, and I don't know how many people really thought that Charlie wasn't behind the mass Gobwin exodus.
Being able to use Archons as relays to cast or link, though, is a bit scary. We knew he could do it, and were pretty well certain he could remote-link, but the idea that he could use any Archon as a caster relay is only not terrifying at the moment because I'm unsure exactly how much trouble he could cause in combat with Carnymancy alone.
I played way too much Master of Magic for the idea of a super-archmage being able to focus his powers through any of his underlings not to be terrifying. Fond memories, of having entire cities guarded by a handful of spearmen, yet impossible to capture because every time someone tried to invade I'd just blanket the battlefield in fireballs.
If Charlie had access to a major combat discipline, like Shockamancy or Croakamancy, it would be utterly terrifying. Archons swooping in, wasting any vulnerable unit, and leaving behind mass Uncroaked in their wake?
Dear God the idea of Wanda defecting to Charlie is scary now.