Saw Fantasmic back on Feb 3rd, on it's second day after the quick rehab. The only pyro missing from that show was on the Steamboat Willie. By the sounds of things, it must be back. I personally liked the SW without the pyro. Like Marni said, it adds a little suspense. The rest of the show looked better than it had in years. Lots of missing pieces from the last few years were all there. The fountains during the princess scene looked especially good. All in all, I love the show.
One comment about Steamboat Willie vs. Mark Twain. I think the characters get MUCH more visibility on SW as opposed to the Mark Twain in the finale. The decking and railings on the MT seem to obscure the performers, so I for one like SW BETTER.
Just one more thing....I'm back at the world (as of the 13th) for another 12 days and will be checking out Fantasmic on Monday. Crowds were getting a bit thick today. Muppet Vision had a full house during the performance I saw, and the line filled the whole queue down the side of the building. Great to see that.