I think the description of "glass cannon" was an apt one. Comparing her to the other mages, all of the mages with 32 or less life have obvious defensive abilities to prolong their survival (Treebond, Deflect, Voltaric Shield, and Divine Reward). Those with 34 life have less obvious means to help keep them alive (Holy Avenger, Sprinting, Runesmithing/Tough). She sits in the middle with 33 life and her only ability that may be aimed towards her own survival is her ability to remove burns from herself. This makes her very fragile.
Meanwhile, the Arraxian Crown Warlock not only has the most life of any mage at 38, but he is also the only mage with more than 34 life with an ability aimed at keeping himself alive (Bloodreaper). This makes him extremely hardy and his new counterpart is looking extremely fragile in comparison.
However, she also has Smoldering Curses, which is probably the best damage boost in the game. It boosts her basic attack to doing the same amount of damage roughly (on average) as her counterparts Battleskill boosted base attack, and lets her do slightly more damage on average with Lash of Hellfire (due to increased Burn chance). More importantly, it can boost the damage of ALL of her creatures as well (if she focuses on ones with flame attacks). Even if she only summons two creatures with flame attacks, she has gained an extra 3 attack dice of damage per round and an extra 25% chance to apply a Burn during the round from this ability.
Conclusion: She has the worst survival odds but the best damage boost out of any mage thus far. Her damage is very specific and fairly easy to counter however. How often these counters pop up and how well she can respond to them will greatly determine her popularity. In their absence, she is a beast.