I don't really think she'll alienate the Indie Kids or anyone really
I don't think there's any antipathy towards her or her music, there are far far far worse acts out there. Her stuff is a bit vanilla for me because I don't think she has a very distinctive voice but it doesn't offend me.
My only gripe with TS is the sheer amount of product she releases and re-releases in various variants etc which does have a detrimental effect on the growth of other acts. As that picture I posted shows there are people out there that buy every single variant and if there was an unlimited supply of pressing plants, I'd be fine with all that too, each to their own but that isn't the situation. It's not just TS, it's the major labels too. Some of the back catalogue that gets pumped out that very few are interested in is baffling. The music industry never learns lessons