I might be the only person who thinks like that, but my biggest problem with Minthara is how she is implemented in the game in general. It feels so punishing being a Minthara fan since she is the biggest punching bag in the game. It's obvious she isn't part of the main cast of companions, you will always be confronted with her being in the shadow of the community because she is locked behind an evil decision.
I get it that some people like her being the exclusive treat when playing evil, but her being locked behind the evil path is wasting so much of her potential in my opinion.
It doesn't add any replayability as well, I think. The ones who would like to recruit her but don't want to play evil, will make another good playthrough and skip her again. Dos2 didn't have exclusivity and is highly replayable.