I expect that Emo will retconn our mage's backstory to correspond with the
Street Magic fluff. Before SM came out, Vranton was envisioned as a "Chaos mage" - a magical practicioner who primarily uses his magic to subvert societal order. His tradition allows him to summon special "Chaos spirits," which compensate for their relatively poor attributes with some sooper-dooper abilities - they can send targets into uncontrollable panics, or permanently rearrange a target's bodily tissues.
The new fluff suggests that Vranton is in fact more of a Toxic mage than a Chaos mage: SM's Chaos Magic (p. 37) is radically different from Emo's, but the description of the Havoc (p. 141) sounds almost exactly like Vranton. The only difference between Vranton and the typical Havoc lies in the scope of their respective goals: Havocs tend to pursue "campaigns of mass murder or targeted assassination," but Vranton doesn't seem to follow any specific or organized "master plan" in his efforts to spread chaos. If the opportunity to easily screw things up presents itself, he'll take it, but it seems he'll only stick with something for as long as it amuses him.
However, I do
not expect Emo will retconn the Chaos spirits out of our campaign. To his mind, they are far too awesome.