The conclusion is fairly clear:
"The simplest and strongest case for AV is that, unlike FPTP, it is well suited to the times we live in. FPTP is a system designed for an age of political tribalism which no longer exists. Voters today have a looser and more dynamic sense of political affiliation than they did in the past – they don’t see ‘politics in such black and white terms’ (Renwick 2011a). FPTP fails to accommodate this change, whereas AV goes with the grain of contemporary British political culture. It promotes voter choice and empowers the electorate in a world defined by stronger political pluralism."
That'll be a YES! vote for me then :-)