Essentially the 40 to 5 change increases the degree of competition between voters and therefore it should reduce whale trails. It may not be the only solution possible. We have some other ideas on the table, such as removing voting power from Stake that is powering down, as well as adding delegated voting pools and peer-to-peer vote delegation. With each proposed solution there are potential drawbacks, or the community may decide it's not what is wanted, but we are actively working to find these solutions and upgrade user experience.