I happen to love her squeaky voice. XD I love the new vocals for End roll in A BEST because she made her high pitch in the original on the single and LOVEppears into something even squeakier (with actual squeaks in the highest notes at the end!!) Haha, I dunno, it's just something I really like. I'm actually sad she doesn't do that anymore, but I still love love love her voice. It's really unique and nobody sounds quite like that.
But yeah, I like all her vocals in all eras for different reasons. I think they're all great in their own way. Well, but I know some people who don't like her voice and find it weird, that her vibrato is too much, or she sounds out of breath during lives, etc. That's normal and understandable.
But whatever. Each to his own.