CFA can be very hit or miss. I mean basically, there's no guarantees with her. Either you can lock your opponent up, get 3 CFA on the field and just wreck everything, or they die as fast as they come down, and while you're getting no SP (spending 7, get 5, get 2 next turn), your opponent is just hitting your LP while you don't develop field. Counterattack IMO is basically a must with her because if you just get put on the LP treadmill, then it's game over.
Not to mention that in both cases (Urgrant and Big Lawt), you're going to get iczered hard if your opponent is at all decent, meaning that in some cases, they don't need to beat you on the field--they just need to do enough damage that your own CFA kills you.
Conclusion: she can be powerful, but she can also get you killed. Fair card.