Re: kamae problem
There no such things like “universal best of all kamae”. Sometimes your body/feet position must be aligned, sometimes must be square with parallel feet. All depends of the goal that you want to achieve. Paying too much attention to the external form may result that you will not develop any content.
As far as kicking somebody that has square kamae, this is very risky activity. We use to establish square kamae as an ‘easy target’ as an ambush for those na´ve minds who will commit to an attack. It is enough to turn hips in the moment of the contact to smash them down to unify with tatami, really no effort LOL