Gale's God ending in his Origin is a far cry from a power fantasy. It is fun on the superficial layer but very lonely if you examine it a little closer. I don't think you are supposed to feel good about yourself as God-Gale. It's probably is more fun if he is your romantic partner.
I have played as Gale, and to me he plays like a classic power fantasy, so I disagree. As a character he is ok (now that his bug seems to be fixed), but I dislike his origin and find it problematic how certain parts of the story are restricted to him. But that is off topic. Back on topic, I have tried recruiting Minthara this playthrough and I think this results in her becoming bugged due to how the game handles the approval drop from 'temporarily hostile'. Made a report to Larian but so far no response.
The other question is how much content for the good path does Minthara even have? This might be another reason why Larian find her low priority. I think most players don't play evil in BG3, I have no interest myself either. Because my impression after a few patches is that Larian pays more attention to their numbers that player feedback.