So, what, you had trouble throwing a curveball in your front yard one day and you decide to stop throwing it forever? Not smart bro.
Pitching is about change, adaptation, working through adversity. If you just give up the first time you have trouble throwing a pitch you might as well hang up your spikes.
For example, since my freshman year in high school my curve has been my best pitch. Absolutely filthy. I'd throw it to anybody. Bonds couldn't hit my curve. At least, that's how I felt about it.
Well, the last couple months, I've started throwing a little harder, tweaked my mechanics a bit, and I've had trouble with the ol' deuceball. But will I give it up? No, because my curveball is the one pitch that sets me apart from everybody else. I'm gonna keep working on it, maybe trying a different grip or release point, and you know what? Eventually I'm gonna find it again, and it'll be better than before.
Honestly man, stop changing things. Work with whatcha got.
Oh, and since hitters of his time said Koufax's curve broke 2 feet, I seriously doubt yours breaks 3 feet.