You're not missing anything, that's just your opinion and I happen to agree with you to some extent. She does have a raspy edge to her voice that isn't everybody's cup of tea.
When I watched her in next to normal for the first time -my first time seeing her and the show-, I was mesmerized by her performance and loved every single detail about it. However, towards the end of her run, she'd started cracking her voice and my rewatch was nowhere near as exciting as the first time - she was still very fierce (hey, that's the first time I've used the word fierce! That's the second!), but her voice bothered me a lot: it didn't help that I'd seen the show with her understudy, Jessica Phillips, whose voice was beautiful and smooth (and gave an equally beautiful but vastly different performance). I'd say that was her normal performance, not an off night, but the beauty of the being of seeing a show for the first time was gone and I was able to pinpoint aspects of it -of her performance- I didn't like. Nowadays, listening to the Next to Normal OBCR, there are times when I think she's brilliant due to how well her voice suits the character and times when it sounds like she's trying to impersonate Daphne Rubin-Vega paying homage to Elaine Stritch.
Throughout the years, I've heard her in a number of things -Sunset Boulevard (her As if we never said goodbye), Carrie and Side Show- and they're usually unpleasant. I constantly wonder how I loved her the first time I watched her.
I don't necessarily dislike her because of how good an actress she can be, but she's not a good singer in my opinion. Some people say that doing next to normal ruined her voice. I don't know if that's true, but I much prefer her in the Side Show OBCR, she sounds much healthier. If that's the case, I do hope she gets her voice in good shape again.
Updated On: 7/23/19 at 02:04 PM