Sweden has already successfully regulated so that the state-owned grid operator is collecting the profits. But other countries have privatized grids and don't particularly enjoy it when an operator forgoes grid expansion in favor of collecting on the price difference. I guess this will result in a compromise where grid operators are required to invest a minimum amount of their bottleneck revenues into grid expansion, while Sweden can take out the rest in a way that's less enticing for private operators. After all, that Sweden is negotiating at all indicates they would like new electricity market regulations in principle, just not this particular aspect of the current proposal.