The outside hardly seems "nearly done" from what I can see. The Little Mermaid's facade and rockwork along with other theming such as paint, landscaping and other more intricate little details took a very long time. And i'm quite certain from what we've seen from the outside of the Dwarf Coaster that there's still a ton of details still to be added. What little we've seen of the inside of the coaster also clearly has a very long way to go, the loading area posted recently on the Disney blog doesn't even look like they've begun theming it yet. And as we've clearly seen, even the simpler projects such as the Princess Fairytale Hall takes Disney a very long time.
A January soft opening seems pretty absurd considering how much they have left to go. February is also probably stretching it. Maybe March or April at the absolute earliest unless the project speeds up considerably. And even that probably has not realistic chance of happening. Summer season is much more likely.