I have been running some tests for the functionality of multiship and it doesn't appear to be working in 2.0 now.
I have a test store called Premium and the multiship checkbox is definitely checked - I tried a couple different browsers to make sure but the multiship option is not appearing at the checkout page.
I cleared the cookies etc so it was a fresh cart but still no luck. I did notice an error when at the checkout though, it appears to be a missing JS file. Would this be the cause?