User blog comment:Druidinhiding/Alternate Ending Theories and Thoughts/@comment-4650675-20121227214802/@comment-5829707-20121227215657

Unless Morgana was still after the throne of Camelot and that was somehow more important to her than magic and the Old Religion being brought back. But you're right, it would have weakened her cause.... although it's hard to tell where Morgana's loyalties lie because she was willing to suck all the magic out of a loyal soldier...

I agree, I want an explanation from the writers as to why they never incorporated this vision into the finale!