Properly working O2 sensor should help you out.

I'd still consider SIMPLE ways to get better low-end throttle control. Could just be a simple matter of fitting a larger diameter pulley from another car onto your throttle shaft. That will give you less throttle plate movement from the same pedal movement. You're wasting fuel right now by not having smooth throttle control. Every time you over-shoot your target and get anywhere near wheelspin, you're wasting fuel. It takes a light foot, and if your throttle is too touchy, that's not easy.