What yu say is True..
she got overlooked by a Bunch of Players and Most will never even experience her as companion.
its the Normal Thing.. People always go Hero and most of Guys only play/beat this game Once.. so they never even Tried Minthara the Normal way like been Evil path.

And i beleave thats why Larian Rushed out the Park the Fix for Karlach and Halsin so Fast in the First place and they are still on it looks like.. hahuaha
so Minthi got Overlooked and super Bugged, like some other companions pay the price too and get bugged along the way.. most are still bugged becouse of what they Did.
BTW i never understood why so much love for those characters from the start.. weird stuff.
For me the best always were Shadow, Lae'zel, Astarion, Minthi..
Were the ones that from the start Make me want to Bring then in my Games..
And i felt Weird they Lock her in Only Evil Path.. but Ok. thats how it is looks like.

She really need Love from Larian.. no Joke..
like i said before.. Never Care for the other companions besides the Ones i talked here..
(I even Wish they make a Smaler Camp for me to Just Bring the ones i Like.. without 300 companions anoying my ass evrytime i have to rest.)