Let there be light.
Anyway, I think you can have a PR system that has members who can be quite responsive, and constituents—citizens of an ordinary riding, broadly defined—could go to a variety of MPs who may be elected on the PR basis to work for them on practical problems that all MPs are confronted with.
On balance, I like the mixed proportional system. I don't think it's an accident that New Zealand, for example, which had the Westminster model before, or Scotland, which experienced the Westminster model before, tried, when they went to a new system, to get the best of both worlds, if you like, by combining the PR with local representation.
I think that's preferable. I think personally it is better to have a local MP who is directly elected—who could be elected by a variety of forms of first past the post—and then your second vote can be for the party of preference. I think that direct contact with MPs is a desirable aspect of the Westminster model, if I can put it that way.
I'll leave it at that.