Tempo isn't that great case you are decelerating on your back-swing near the top. That is why you aren't bringing to all the way to parallel. Wouldn't be the least bit surprised if you have a bit of a fade in your shot.
Your knee going conkey isn't a big deal, some of the greats swings weren't textbook(see Palmer, Arnold) but it is consistancy.
But come one, pull up the panties and take a full swing.