I've rewatched his solo outing, and AIW, and whoever that is on the screen ain't Dr. Strange. Love Benedict, and think, personality-wise, he nails The Sorcerer Supreme. But the adaptation is hideously flawed.
This is a case where Feige and his posse completely missed the mark. What Disney/Marvel has given us wears Ditko and Lee's character's facial hair and greying temples, but that's about all. Gone are the intricate, alliterative spells, in favor of a generic quasi-Kung Fu Green Lantern-esque power. The astral form, which was always Doc's signature ability, is barely used. The Cloak of Levitation has become a comedic sidekick. Most of all, the idea of the mystic atrs as a product of long study and discipline, is handwaved away as a matter of photograhic memory and near-mutant-like talent
Some of this, I imagine, is a function of needing to get Strange fully ramped up for AIW; there was no time to develop him. Some of this is needing to give Strange a role in Thanos' scavenger hunt. I have to wonder, tho if some of this is Disney not wanting to take on a concepts that make half the planet's major religions uneasy.