Regarding your third point, I believe that Roops will be addressing the hitboxes and stun times as a result of the survey feedback. With different guard units on the horizon it makes sense for this to be kept under review for further balancing.
A good point raised about distinguishing level features from background assets. Definitely worth keeping in mind.
Personally I quite like the ease of wall-jumping, with the flicking of left and right for consecutive jumps - one button as opposed to two - but one's mileage may vary. Do agree about the Cat Knight though; I believe it was also a popular topic from the survey so Roops is very much aware.