I've watched some college hockey games she's done in the past (at least I think it was her) and don't really remember having any strong opinions either way. I watched the Coyotes-Ducks game tonight so got to listen to her tonight for the first time with her on ESPN. She's not as bad as this thread would lead me to expect (I read most of it before the game started because I have no life). I didn't think she was that bad. She's got some things to work on. Mostly, it often felt like she wasn't driving the commentary anymore, which is what a play-by-play commentator should do, so Kevin Weekes had to take over to avoid dead air. Some of her descriptions of the action were also very bland, or just... on a level of "why would you say that?" These are things that experience can fix. I see no reason why she can't get better over time. That's my basic analysis of her as a play-by-play commentator in a nutshell.
I'll speak of two other things about her. It's perfectly reasonable to find it unfair that she has the job in the first place, because having the last name "Hextall" automatically opens doors for you that others have to work pretty hard to open. I could opine all day about it, but I just don't feel strongly enough to. The second is, while listening to a woman call a hockey game was very different and not at all what I'm used to hearing, it didn't bother me in the slightest. Perhaps I'm biased because I'm a woman, but other than being "just different" it made no difference to me.