i have the exact same effect as your describing. I dont call it a problem anymore, because i have learnt to work with it, not against it. As you explained in a few posts back, it certainly is all about throttle control. Use this 'feature' for tight/sharp corners that require more throw into them. if you need to slow down, feather the throttle but dont off the throttle straight away, in saying that when your in need of the brakes, brake straight away, dont off the throttle for a bit then brake. i find if i do have the throttle low my chassis wont spin out, its just when i have no throttle applied is when it wants to spin...
Your theory maybe correct, but since the car is moving forward, wouldnt all the weight get transferred to the rear, then when you off the throttle all the weight would transfer to the front causing the spinout effect...