Super briefly, no small task there.
I would say that probably the easiest way to look at this would be doing something similar to Robert's suggestion in that you have ridings where you add proportionality into the mix. You still have a clear regional representative however you choose to elect, whether it's by a system like his, some kind of mixed system, and so on.
The biggest issue, though—this is where the trade-off between that voice that you're speaking about and having a local rep becomes more tangible—is that, unless you grow the size of the legislature, which a lot of folks don't want to do, you end up with larger ridings where a person who represents me here comes from the other end of the island, let's say, or Labrador.
There are a lot of folks who argue that's not desirable. Personally, I'm not that big on regional representation. I think that we are exalting regional diversity over other forms of diversity, and I would actually rather see us prioritize other forms of quotas because that's what the system really does, it provides quotas for regions. We're saying that's the most important source of representation, which I don't think is actually a priority in the same way as I think that other forms of representation are.
Again, that goes to that issue of values, choices, and priorities. You could certainly achieve a local representative along with this larger voice that you speak of, this desire to not have wasted votes if you had a system change. That doesn't guarantee my other bigger priority, though, which is this issue of what kinds of people are getting elected. So, for me, that's the most important issue, and system change could lead to that, but not necessarily. That's where the tension is.