That's a terrible solution, Henners, the c-stick is incredibly useful.
To OP, by inconsistent, I assume you refer to how sometimes you'll be pressing the c-stick and the move won't register, right? It just seems to ignore you? This problem was brought up a couple days ago, and there seemed to be some mild consensus that the problem is remedied if you allow the c-stick to return to the neutral position after every move. If you do not allow the c-stick to return to its neutral position, the next c-stick move will not be registered.
I do not know for certain that this is 100% the cause of the c-sticks apparent insensitivity, but since this was mentioned, I have been careful to let the c-stick return to neutral as often as possible after performing attacks with the c-stick, and the problem seems less evident, so it would seem this is at least partly, if not wholly, responsible for the problem.
I would suggest you start training yourself to do this, and hopefully you will find the problem lessens and eventually disappears.