Personally, I'd like to see Davis Cup/Fed Cup organized as multi-year events, similar to how soccer World Cup and basketball World Championships are organized. In the off-year(s), the countries in each geographic section would play each other. The top countries from each section would advance to the world group finals, which would be played in a fixed location over a 2-4 week period. The smaller nations would get home matches for the qualifying ties. The final event would be played at a known time and place, which would make it easier to get media coverage. The countries with the top players could manage those schedules so that they get called in when they are needed. Could this work for tennis?