since it sort of still is Dax, it adds on top of Jadzia’s crap.
Is it though? Isn’t that one of the things they deal with a lot with Trill - are different hosts actually “the same person”? I’d argue it’s “partially at best” and is one of the interesting things about the concept of personhood over time sci-fi deals with. In a lot of ways, Ezri is at best like a 30 year time difference in the real world, but maybe even more like a sister/cousin at the more extreme side of being different.
I haven’t seen DS9 since the first run I don’t think, so my memory is hazy, but did the show make those things “good things” or were they flaws in the characters?