Though the way the leaker describes it makes it sound more like a 3rd person MOBA than a hero shooter.
To be faaaaiiiiir… D:OS (both of them) make the age-old mistake of having really slow, uninteresting, prologuish RPG starts. It takes a solid 5h of powergaming or 10h+ of normal play to get past that hump. That’s the point where the story picks up and you have enough tools to start really taking advantage of the games sandbox.
With BG3 they really seemed to have learned their lessons.