Our voting system is definitely an issue, but if we want to use the efficiency gap as a metric of gerrymandering then I think this is a big problem. As it stand

Our voting system is definitely an issue, but if we want to use the efficiency gap as a metric of gerrymandering then I think this is a big problem. As it stands, the efficiency gap treats a 75-25 split as a "perfect election", which means that it's actually a measure of how far elections are from this ideal. So if we start using the efficiency gap, then there will be a huge incentive for states to draw lines to be as close to 75-25 as possible, which is obviously not what we want. It could even further polarize the country.