Hi Julien. One concern I have with this is having the link to an experiment results page taking you to different results depending on what your last dimension was. That could cause confusion about what results people are looking at. Indeed I think that Spencer's usage of custom reports would be the best approach in the short term.
That said, having it easy for everyone to see the breakdowns that matter to you by default (and being able to update those in the background, not just overall results) is something we're aware would be valuable.