I’m guessing the sheer size of Fluffy will be impressive. It will definitely be limited movement, similar to Flight of the Hippogriff’s figure. When it’s outside, there’s not much you can do I guess.
It helps that I think we will be moving past it, (albeit slowly,) and not stopping, similar to Hippogriff. So intricate motion would be lost anyway. I’m still excited to see a memorable creature brought to life though.