I think you could make the central white column a little larger.. as in… broader.
The post titles (dark green) could use a more bright/happy colour, and maybe a more colloquial font.
I like the post text colour. It could be a liiiiittle bigger though.
(This way, there would be more text in a line, with a bigger font, a bigger image and a clearer title)

And.. that’s it!

PS. I got nothing against the current design. Just Pleeease don’t end up like “Cult of Mac” or “Mac Tricks and Tips”.. they’ve changed their design to a white, messy, full-of-stuff page without any sense of minimalism.. other than that good luck!