Offering some constructive criticism, one area where I think the theme is a little weak is the Blog.
I’ve only really noticed this as I’ve not had to set one up before. I’m looking to replace a site using the Hueman free theme and there are couple of cool features in it that I am suggesting would be great additions for Generatepress. (i’m sure you have thought of these before!)
The first is a native related posts section at the end of each blogpost.
The second is an integrated social sharing for the posts.
I know that these things can be achieved with plugins but I would trust you to make a better jog at implementing a lightweight site friendly solution!