Well in my Opinion the Problem with Gale Character its that he was not Created to Be a Companion..
Karlach Falls in the Same Stuff..
They were Made for yu to Play as Then.. not to Bring then as companion..
I *strongly* disagree here. Gale has *lots* of content as a companion from act 1 to act 3, far more than say, Shadowheart or Astarion. He's literally the companion that explains everything surrounding one half of the main plot; namely that particular object that the main villain wears. He also is the only one that can uniquely influence how you end the game. And, as a companion, Gale has probably the most growth as a character during the campaign- where he can take the route his Goddess asks of him..... Or where he goes completely off-the-rails hungry for power. I'd say that Gale is actually one of the best written companions from start to finish, seconded only by Lae'Zel.
If you play *as* Gale, you're basically a Human Wizard Tav. You get a really fun cat in camp, but otherwise would never know that you're Gale of Waterdeep until the very, very end.