I like the nav changes, but I think the old pages looked neater and more organized, more pleasing to the eye, easier to scan for info. Especially the features section. I cannot speak to the content changes (yet).
So my suggestion would be to reinstate the old content boxes.
Do you mean bringing back the 6 feature circle icon/logos? Or just the background colour/border?
EDIT: Raised a relevant GitHub issue: https://github.com/grctest/Gridcoin-Site/issues/42
I'd say mainly the background color/border and general grid layout feel. The icons don't hurt, or even serve to make the whole thing look friendlier, even though they're a bit random.