No, that's not how 'wounds' are made. Wounds in the Force are formed when a great many lives are suddenly extinguished at the same time e.g. Malachor V & Alderaan. Stripping one of the Force doesn't make her a wound, just Forceless. And I think it was the fact that Traya taught Meetra to regain her powers that created the Force bond between them. But yeah, Force wounds are formed through multiple deaths and it was the Battle of Malachor V that caused Nihilus and Meetra to become wounds - as they were both present.
That is true, I forgot about that, also wouldnt Traya also be a wound in the force since Nihilus had once stripped her of it and it seems that she and the exile got it back in the same way through each other?
This means that Sion, as far as I am aware, is not a wound in the Force. Neither is Traya.