^ agreed. THE ONLY STAR tour 2011 filmed concert was quite a disaster as compared to this year's.
She most likely has a problem with her voice, but I don't think it's fully related to her Eustachian tube problem. That occurs only when she screams because she can't hear properly.
But her voice has been sounding quite raw, used, as if she had nodes on her vocal cords or something. And it's definitely getting better with time.
It's probably gonna take time, but she might get her voice back in the future. In the meantime, her voice is only different, not necessarily bad. That's why I thought what you've said was quite rude.