I think this sums up a lot of what I feel about the current AV referendum, which will almost definitely go by way of the No vote thanks to the nastiest media campaign I have seen in a long time.
I do want to add that democracy does not begin and end with the ballot box or voting system.
MPs and councillors are there to work for you. Unless you make sure they are working for you, by writing letters (not emails – they’re pretty much useless), or by visiting them and pressing home any point you want to make quite clearly, then they are unlikely to be acting in your interests. This doesn’t mean become an annoyance, but it does mean cultivating a decent relationship with them, and articulating why you think any particular concern of yours should be addressed. (I’ve done this, and think I’ve not become too annoying…)