They have to hire people, train them, test the rides (FJ & Hippo) which also requires even more training for the employees, etc etc... I'll have to ask some of my friends that worked WWOHP in Orlando as part of the opening team for the exact timeframe of when they started training before soft-opening.
Considering how much downtown Orlando's FJ experienced, I'll be surprised if they start soft-opening the ride in March... Hopefully by this time around, they've got most of the bugs worked out so testing should run smoothly. I'm certainly not looking forward to the long lines of doom! I wanted to do single riders, but my friends forced me to wait in the actual queue line :angry: July 24, 2010 is when I first rode it.. so only a month after it officially opened, I got to experience 2 breakdowns on my first ride. Thankfully they were at the beginning right after the load platform (40mins) & then again at the end of the ride in the "welcome back" scene (15mins). yea fun times..
Don't expect Hogsmeade to open early even with scaffolding coming down, there is still lots of work to do. While scenic may be completed on the exterior, there is still A LOT of scenic details that need to be done in each window & whatnot. Also, they won't open the new area without its 2 rides finished/operational.