That Ken and Dudley were quite scrubtacular. I noticed a few things missing with your Q that would make him better:
One, I dont think I once saw a standing MK with him which is basically his best poke and spacing move. You can distance yourself from most people with that simple move so that you can pick and choose when you want to attack. Even if it gets parried it has such long reach that you are many times out of reversal range, it also is a move that comes out different than most making it not as easily parried as other pokes. (Eg: Shoto's cr.mk, Dudley HP, Urien fw.MK)
Two, every round with Q you should get the three taunt defence bonus ASAP. There are times when it can be hard to get in however in all those matches there were many times you could have. I dont think you once managed to get the 3 taunts in all 6 rounds on both vid's. The key to Q is learning how to play defence. The best Q's (Kuroda - cant recall if that is mis-spelt) have excellent defence which with Q is the only way to be able to play him at a high level.