I think there are more options that should be available.
1: Honestly, I don't see "autopatcher" as DRM, especially if we can still download the full version without DRM. So just offer a DRM free download to those with the physical disk, and you have the whole thing.
2: I think a "standard" copy that syncs to steam could be an option for those who don't care too much about the DRM free.
3: I know it's an unplanned expense but I'd really rather have the game on an updatable USB key. They're really not too expensive in bulk, but I understand it's an unplanned expense, though probably cheaper than shipping a disk separately (especially internationally). This lets users update the copy on the key while keeping the DRM promise.
In general, I voted for the "ship the disk later" since we'll still have game access.