I'm pretty sure most people dont' max cyclone kick simply because there are so many worth-maxing skills for Tia in general. I'm sure it's decent enough, but I wouldn't want to choose it over Fairy Thorn, Surprise Attack, or Wind Wedge, myself, and after you get all those up-close attacks, most people would prefer to spend their remaining skill points maxing a ranged attack like Thunder Shock or Flying Knives (or both!)
Currently I'm main-ing two full-time fisher-girls. They fish. A lot.