Oh she is fast, I just worded it badly. She's not a slow character, but she's not the fastest either. Granted thief can't air dash so he's slower than an Amy using steps, but meh.
Amy's agile and quick, but her damage is a bit subpar, and she has short weapon reach. Those two mean I won't be able to solo gaikoz quickly enough to be able to stand getting her 2nd unlocked. I'll eventually do it, perhaps. Maybe over a period of time, just do a run when I get bored, or I might cash it at some point.