Thats why I think splitting Shadowheart on Shar and Selune route would be the best thing and this will make sense.
Sharran SH obviously thinks that Shar is nice(w/e) and she follows Sharran ways with pride, so she should be fine with everything that was mentioned(literally reaction that we have on live is good for that route). Selune SH obviously is traumatized by memories and everything that happened there and in distress, she wants to get as far as possible from Shar influence and Sharran ways(she literally says this).