I like Jelly and can put up with her voice most of the time, but when she starts getting a little more whiney and making random noises a lot, it does get a bit grating. I assume her more mature singing voice she does sometimes is closer to her real voice, and I think it sounds great. I do wish it was reversed where she uses her more mature voice primarily and goes to the higher pitched voice from time to time. Kind of like what Erina does from time to time. But, I guess what she does now fits her character, and I still like Jelly, so I try to catch some of her vods.
I do agree about Ember. I haven't watched the Fallout stream yet, but I've been liking her streams a lot. She's a lot more chill and relaxing to watch than the others. Surprisingly, while I do like Dizzy, she's been my least watched out of the three lately.