That is one of the failings of the system. Generally, it has been observed in countries that use MMP that MPs without constituencies are still very active in the constituency where they live. I think that a non-constituency MP would have more legitimacy if they were elected to the Houe off of an open party list.MMP systems are good, but they create two types of MPs; those that represent constituents and those that do not. Will the voice of a non-constituent-based MP have the same weight as a constituent-based MP?
I don't think so. The idea is that each person has two votes. Usually, the idea is that the first vote is cast for your local representative who will represent your constituency in the House (the system we use now). The second vote is for the party of your choice. The parties each provide a list of as many candidates as there are proportional seats contested. If a party wins 6 proportional seats, the first 6 candidates on the list sit in the House.The open list seems like a good idea, but wouldn't having an open list essentially create the same kind of SMP system we have now? Just curious.
The problem with this "closed list" is that the parties have a large amount of power. Generally, the percentage of the popular vote that a party receives doesn't fluctuate by more than about 5% either way. Lets say there are 100 contested proportional seats. This means that if a party usually wins 30% of the vote, then the first 20 or so candidates and the top 60 or so don't really need to campaign - they will either get in, or they won't, but it is known before hand. numbers 21 to 39 will be actively campaigning, because they know that they have a chance, but it isn't decided.
The other option is an "open list". The second vote cast is still for a party, but the elector will vote for a specific candidate on the list. The votes are still counted proportionally. If a party wins 6 proportional seats, then the 6 candidates on the list with the most votes will win seats. This takes control away from the party.
The chances of STV being adopted federally are very slim, although it will most likely be used in BC. Personally, since STV is pretty much not going to happen, I would support an open list MMP in its stead.

