I would recommend, again, to end where you began, which is not over-hyping any of these systems.
We know from Pippa Norris's work that the kind of system you have is important and has an impact, but it's not necessarily the predominant factor. There are a host of other issues, such as political culture, the quality of the people running, and so on, and I think this is an area that requires some modesty, both in touting its impacts and also touting its defects.
So yes, our system can be improved. Will it be transformative? No.