What you experienced when you cut the coils is increased camber gain on the front end, that is why it handled better. When you install drop spindles you lower the ride height which in itself will help improve handling, but doesn't change the amount the outside (loaded) tire gains negative camber in a corner. If you combine lowering the car with cutting the coils and increase the negative camber gain you get a double handing advantage.In my experience of cutting Trifive front coils or using lowering springs, the car actually handled and steered Better than before! I can't explain why but that is how it worked for me on several cars over many years. Having said that I use both dropped spindles and lowering springs on mine now. But nothing bad happens with a cut coil.
Whichever route you go, set the static camber to negative 1/2 and that too will help the front end stick to the corners (and improve front tire life).