Andrew Coyne shares three ideas that he thinks could increase voter turnout in Canadian elections: http://news.nationalpost.com/full-comment/andrew-coyne-three-ways-to-cure-the-disenchanted
I am glad to see that electoral system reform in on his list. Enhancing the choice available to voters on the ballot is number one on my list of how to improve voter turnout and civic engagement.
From my perspective the main problem with first-past-the-post is not that it is a winner-take-all system, but that it offers voters minimal choice (or in some cases practically none). Political parties select who who will be on the ballot, and voters have no means to indicate any preferences among parties or individual representatives.
In my view a system that provides more choice and ability to rank preferences among individual candidates would encourage many more people to vote, who otherwise stay away from the polls because they are unsatisfied with the limited options they are provided with.