Time to cut right to the chase.
The October 10th referendum to determine whether or not Ontario adopts the mixed-member proportional form of government will be the only opportunity for electoral reform in Ontario.
Some people who do not support mixed member proportional but who ostensibly support electoral reform, are going to vote "no" in the referendum thinking that in a few years down the road, there will be another opportunity for electoral reform. Maybe to institute single transferable voting or something else.
Not going to happen.
While I give credit to the Ontario Liberal Party for actually including the question on the October election ballot, I would argue that the majority of Liberals prefer first-past-the-post for the reason that it gives them the best chance to form a majority. That said, I'm also of the opinion that the same holds true for the Ontario Progressive Conservative Party.
The short story is, if we do not achieve those votes to ensure that mixed-member proportional is recommended, there will be no other opportunity for electoral reform in Ontario. Future governments, including the election this fall of a new Progressive Conservative government and way off future Liberal governments alike, will claim the results of this referendum reflect the will of the people, and it likely won't.
Truth be told, if you do want a different style of electoral reform because you do not like mixed-member proportional, you'd have a better shot of achieving that with a mixed-member proportional government.