Changing to PR will be a tough sell so keep everything the same except the allocation of seats. Complicated ballots and seat allocation are a turn off for people who are already disinterested.
An open list system that allocates seats in each province based on the percentage of the total vote each party gets in each province, above a 5 percent threshold. (MMP is not supported by MPs and is unnecessarily complicated.)
The open party list would comprise the candidates that receive the most votes in their riding arranged in descending order. If you do not attract enough votes you do not make the cut. If you want to send your candidate to Ottawa make sure you vote.
Such a system would ensure that the five parties who currently have seats would be represented in most provinces. (except Bloc )
Some ridings might not have a candidate who makes any party list. Parties would find it advantageous to provide support to those constituents in the same way that they do for cabinet ministers or MPs who are only interested in party activities at present. Samara found that 85 percent of constituency help was provided by the office staff.