In the epilogue she says we haven’t tested scoring methods.

But in my local county council elections we had something to that degree. Every candidate (multiple candidates per party and independents) had three boxes. And every elector had 12 or 20 or something crosses to distribute. So you could give 3, 2, 1 or 0 crosses to a candidate.

Maybe the difference is, that didn’t yield a single winner but elected members of the council.

Which is also a much more glaring issue with fptp systems: not the race for president, but the fact that there are only 2 parties in parliament.