It takes about 5 seconds to change which revision I'm looking at, in a 30-line document. And it doesn't actually show me which lines changed.
This is still useless.
I'm not getting a 5 second delay here. It's instant (~0.5 seconds).
You're right about the changes not being marked up, although it does do this on Office 365 so perhaps it's a market segregation thing.
It takes about 5 seconds to change which revision I'm looking at, in a 30-line document. And it doesn't actually show me which lines changed.
This is still useless.