You know what's ironic? You don't think much of Obama and think Harris is different from him. I like Obama a lot and think Harris is very similar to him (and will appeal to similar groups), but I don't actually think that's a good thing. I worry that too many liberals will rush to anoint her as the "next Obama". That's bad because a) they'll focus on superficial similarities and avoid really looking at her record, and b) I think it would be disastrous for Dems to just run back the '08 playbook over and over again (just as it would have been a bad idea for Obama to run as the heir to Bill Clinton; in that sense, beating Hillary was the best thing that could have happened to him.)
What I've seen from Harris so far has been impressive as far as it goes, but I haven't really heard anything that strikes me as new and different. I know your criticisms of her are more ideological, but for me, it's more that I want to see someone who's peaking around corners and has a good sense of where the country is going. So far, it feels like Harris (and pretty much all of the Dems who have declared so far, really) are following more than leading. I'm not giving up on them yet -- the truth is, I know very little about any of them -- but that's where I am right now.