I figure you're right. Cumberbatch is my second favourite choice for Strange (and my favourite is dead, so), the first movie did an okay job with him...
I was hoping for something different myself as well. Something with more grandeur, more serious awe. The Shuma-Gorath...thing...kind of ruins that (both name and depiction, thus far), but I guess I'll see.
Will probably watch it, even if it means I need to get Disney and watch some of the What If's just to get an idea on the background.