Eh, the problem was that no one played 2.06, because the English patch didn't work with it. When 3.01 came out, she was one of the first characters I selected for Team Unappreciated, simply because no one used her for 2.04, and I wanted to see her boosted formula for myself. As it turns out, she really is a top tier damage dealer now.
Really, I think I've re-evaluated my opinion of a lot of formerly forgotten characters recently. Nitori is just one of many characters I now have a lot of respect for. Iku is probably the next biggest character that I'm seriously advocating. Yes, doing 200k Megawatt Linear Guns at level 138 is pretty good, but doing 300k+ with the same attack is even better. And with all the free PAR resistance that comes attached to lots of good physical attacker gear throughout the game, the "drawback" is anything but. I mean, with Iku on my team, Orin's buffed Blazing Wheel does comparable damage to unbuffed Megawatt Linear Gun, except with much lower delay!