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Here are a few things to work on:
- Your logo could be be better, looks just like text right now
- Either tie the blue color in the rest of design more or lose the blue color
- The text on the header image is a little misplaced, same with the social links.
- Define the right column more.
- Put the thumbnails on the left of the content instead of the right.

I like the logo recommendation. I'll work on that. I was struggling with that.
I really don't want to ditch the blue color so I'll see where else I can tie it in. I experimented with having a blue color be the background for the sidebar for definition.
I think the comments need a lot of work like you mentioned. Moving the thumbnails is a great idea to start.
Thank you for your thoughts!