I think from a tech perspective expanse is in line with providing everything an election system needs to be fully transparent and fair.
The obvious question is how much leverage do we have with the govt to adopt such a change. Even though exp and borderless are not tied to any particular country but nations and leaders that keep a negative impression of americans will need more convincing.
I think the pilot program for the exp voting system will provide very useful data and will most likely make it a little bit more clearer how the voting module can be utilized.
At this point it might be a little too optimistic to think that exp will replace a countries election process right out the gate. I think a more achievable goal is to replace various polls that are often conducted which people have even less transparency on.