Replying to Rossignol boots any good for freestyle?

I bought a pair of Rossi boots last year because my local shop is big on Rossignol products, and they didn't sell Full Tilt or Dalbello boots etc. They're the Alias 70 Sensor and they only have a flex of 70. Should I just stay with an all mountain boot or trade them in for new boots at a different shop? Btw, I changed shops (kind of) when I moved, and they do sell boots with better flex. Any advice is welcome.