We absolutely could if we sat down and asked what we want our upper house to do. When you have bicameral legislatures, the first reason is to get a second thought. Sometimes it is structured so that you get a second sober thought, a less partisan thought. Finally, it normally has different representational goals from those of straight representation by population, including the representation of the vulnerable or minorities. Of course, all that could be structured.
By the way, the single transferable vote mechanism in Bill C-20 also could have some beneficial effects on diverse representation. It's hard to see exactly how, but it could. Proportional representation is generally thought to have some kind of beneficial effect on broader representation. That part of Bill C-20 could be a plus.