I'd agree, and said earlier that the evil path was a bit too evil, and that some sort of middle ground path would make things more interesting. At the time I agreed that there was no logical reason to follow the Minthara path, but I would take that back now after many more playthroughs and more interaction with Astarion. I do think that one might conclude logically that the tadpoles aren't going to turn us into mind flayers, and that in fact siding with the Absolute might lead to great power, as it has for some of the True Souls that we've met. The fact that unlike these True Souls the PCs have agency certainly has promise for truly evil characters. It's not my cup of tea by any means, but I can see it.
That being said, I can see a bit of a morally middle ground whereby maybe the PC helps destroy Kagha and the druids in exchange for safe passage for the tieflings. Kagha and her enablers certainly don't present a friendly face for the druids, and given the fact that even Zevlor is willing to suggest the PC assassinate her suggests that he might be willing to help sell the grove to Minthara in exchange for safe passage for the tieflings to Baldur's Gate. This might be too much investment for a third path, but it is one that I could see some PCs reasonably making.
All that said, when the game releases I am definitely going to play the good guy, and very much enjoy that path. Karlach will add another good aligned character as datamining has revealed that like Wyll she leaves the party if you side with the goblins. Whether or not the prospective Helia character turns out to be part of the final release is anyone's guess, but it stands to reason that she will be a good character too, as I believe they stated somewhere that it was more important in early access to get feedback on the more "prickly characters" than on the obvious hero ones.
