User blog comment:Morgana High Priestess/Could have Morgause brainwashed Morgana?/@comment-5102537-20130311075520/@comment-5674726-20130315002102

Sounds to me like she actually didn't take himseriously anymore when she returned after the year with Morgause and that she saw his emotionality and maybe even his love for her as a weakness and him as a whining person.

There was a pronounced shift in her attitude towards Uther. Season One/Two Morgana would have had some definite food for thought based on Uther's attitude towards her following her return. Didn't he lose about half his army searching for her? The revelation that she was his daughter, coupled with the fact that he pushed Gaius to use magic to save her and didn't exact any kind of reprisal against him for using magic after he had what he wanted would have rocked the viewpoint of the Morgana who called off her first assassination attempt after she was convinced that Uther cared far more for her than she previously believed. It wouldn't have made her confident enough to announce the fact that she had magic but I would have expected that she would have reconsidered her belief that Uther hated magic more than he cared for her, and that she wouldn't have felt as frightened or angry as she once did. Given that she knew that Morgause was her sister, that Uther knew this and that he knew that Morgause was a sorceress, it wouldn't be a huge leap to conclude that Uther could have reason to believe that magic ran in Morgana's family. At minimum, Season One/Two Morgana would have been very conflicted about Uther.

It would have been a potentially very clever twist if Morgana's changed behaviour turned out to be the result of an enchantment - though they'd have needed a reveal by the end of Season Three/beginning of Season Four at the latest. Unfortunately, I think it was more a case of the time jump being used to skip over the character development.