Is an empty milestone 0% complete or 100% complete?
This is really cosmetic, but it really bugs me to see an empty Milestone as 0% complete!
It really begs for someone to start working on it, in order to make it 100% complete but there is nothing that can be worked on to increase it to 100%.
Therefore it should be at 100%, by default. Let's take a more optimistic look on that metric, kinda like a half full glass.
And that's all I have to say about that...