So you're saying Embrace will have insta-cast? This would have to be turned in to an ability, and because of that no doubt it will be nerfed in potency (just like Whispering Dawn) to reflect the change or Physick would be buffed.
Embrace would also no longer benefit from Rouse, making the potency increase from it worthless. Also you said auto attack for pets, so I'm assuming you include the fairy? Why does it need a DPS auto attack, SCH already brings plenty of it itself.

Wind Blade to instant ain't so much a bad thing though, it means Contagion had more chance of going off correctly as opposed to it requiring multiple clicks, because it doesn't always register the first time. The Bahamut changes seem ok, considering it's actions have a lot of range it could work in most environments (i.e. not chasing mobs).