Sophie, Would you like the viewer to have more of a background to how you collated your evidence for the piece or is it meant to urge the viewer to ask questions like the AB posters already have?
Is it meant to be clear, or more of a talking point?
It is confusing to me as it appears to be scientific looking, but has no explanation as to how the evidence was collated or that Liverpool is the main city of which the other areas are related - could this be made clearer by perhaps centralising Liverpool or making it a more dominant 'pie chart'?
In regards to the blog layout - have a play in layout and templates, this way you can get your most popular posts on the main page so people can find your pieces easily, fill in the 'about me' section and look at changing the main background and size of your blog pictures to emphasize your pieces. Here's a couple of nice examples of blogspot layouts:
http://lloydkahn-ongoing.blogspot.co.uk/
http://sweetpeahome.blogspot.co.uk/
http://nycgardening.blogspot.co.uk/