Really, I cannot get worked up about AV. It would make tiddly squit difference to the results of recent elections (so far as anyone can tell) and is, IMHO, a fairly meaningless sop to "modernisers".
With or without AV, we will still have a system that actively prevents constituents views from being represented. An MP is elected, but then is expected to vote, in the main, along party lines in Parliament. Why should an MP with a majority of 1 vote in the same way as one with a majority of 10,000? But I, as a constituent, may agree with the Conservatives in some areas, Libdems in others, and Greens in yet others. Who is representing me? I suspect that most are like me, except for the diehards who vote Labour/Conservative simply for the name, with no thought for actual policies and effects. The real change that is needed is to abolish the party whips in Parliament, make every vote a free vote, and encourage meaningful debate and representation. The Prime Minister could even be elected not as a party leader, but as the member who could command most support in the house; ministers could be selected on ability, not just who is available from one party. IMHO, the current coalition is a step in that direction, and I wish more people could get behind it and see how co-operation works out.