Will a bigger umbrella help with hot spots?

[fooby]

I want a large, soft light source for shooting portraits when I want to stay light and use speedlites. I know that standard sized shoot through umbrellas suffer from hot spots due to their profile and how all of the light is focused on the part closest to the subject. Would this be alleviated somewhat with a much bigger (75") umbrella? For reference, my favourite light sources are very large octaboxes.

Thanks!

EDIT: Please ignore this, I posted it in the wrong section.