While I generally support this, I would like to point out that unless you are playing Durge, there is no reward in any capacity for playing evil once you make Minthara accessible to good.
I want to note that there will also be no reward for returning the Nightsong to Ketherik Torm and completing his assignment with Isabelle.
And there will be no reward for killing Astarion, Gale, Laezel and Shadow Heart at the first meeting
Thats not true!, as Durge you get
, a great memento XD.
Sry couldnt help myself :P. I havent played durge yet myself btw, only seen video of it.
Jokes aside I agree with your sentiment (if Ive interpreted it correctly). There are a lot of bad things you can do in the game, some are rewarded, gives you interesting story beats or cinematic scenes, but not much more. And thats to be expected when you kill off characters and NPCS.
If one does not want to miss out on large parts of content/quests, then one probably should do evil/Minthara route on a later playthrough and not the first one.
I for one dont mind an option for recruiting Minthara in a "good" way. BUT it would have to only be an option. A lot of work has gone into the way it is now, and thats certainly the way I intend to recruit her, when I come around to it on my 3rd- 5th playthrough in a year or two.