I don't think you retroactively change what happened in an election. They ended up with three parties, and, as I understand it, there might have been a fourth, with seats in the legislature. We are talking federally here, but if they had some kind of rep by pop in Alberta, there would be a minority government, just as there would be in virtually every other province. In those provinces, whoever happened to have the most seats would be able to govern only as long as they could command the support of a majority of the legislature. In the event that this failed, somebody else would, presumably, have the opportunity to do so.
On October 5th, 2016. See this statement in context.