Yes, I received that email telling me that perhaps my Timeline data was gone, and it was :(
I'm fed up with them mucking about with Timeline. I used to enjoy being able to look at Timeline on my PC, but they took that away. Such a hassle to view it on the mobile screen, but anyway, that's what was left.
Luckily I had the Encrypted Backups turned on that they suggested a while back, so my Timeline data is back.
But the day will come when they either delete and lose my data completely, or they'll reduce the functionality till it's no longer useful.