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I appreciate the religious standing of your friends. I also have friends who are practicing Wiccan. That being said, the Witch is part of the Pathfinder rules. Namely a class within the Pathfinder world of Golarion. It's not meant to emulate people who are Wiccan and refer to themselves as Witches. There is nothing wrong with the Pathfinder Witch, and no changes are needed.
However, you seem to have a pretty firm idea of your own envisioning of the Witch class. The Pathfinder rules are great in that you can throw away any part of it that you wish. Or rebuild it how you wish. Nothing is stopping you from doing so. You've got a good list of stuff there that you can add to your own version of the Witch class.