Yeah his voice isn't as good as what it used to be, but i still think its good.
His voice used to be amazing! Just listen to "Always" his voice will never be like that again, but the way he pulls of "Make a Memory" now is still good and he can still sing.
When he does them faces, it might just be that he is nervous incase he doesn't him them high notes anymore. I think he just needs a bit more faith in himself and then maybe he will pull high notes off without doing weird faces