A small country like Denmark has 2 price zones, Norway has 5, Sweden 4 zones.
Then we have all the 3rd world countries (From an energy perspective) like Germany, UK etc.
France is a bit special, as they built the powerplants wisely near where energy is needed.
Sweden denied Germany a new cable before they fix their problem with 1 price zone. As it is now, Germany buys lots of electricity in Denmark, Sweden etc that ends in the north of the country - but it is needed in the south. So they cause increased prices in Denmark, Sweden and Norway (by buying) - and then they have to pay afterwards to stop energy producers as they can't transport the electricity.
We need to stop this, and it can only be done with different price zones within the countries. Germany could obviously be split up in east and west Germany (as there is few cables across the old border), or they could be split in th "Aldi Nord/Aldi Sud" zones, as that makes sense. Or split in 3-4 diffeent zones.
No matter how, the heavy German industry is down south where they only have solar power - So they will be hit with increased energy costs, and new industries might be formed up north, or even in east germany where there are lots of unemployed to take jobs.
Price zones makes sense, but their are strong lobbying against it, as indistry is often badly placed.