Hey all,
I don't want to rain on anyone's parade, but regarding wearability, it's my understanding that is something that could potentially violate certain licenses with Lucasfilm, so this was always designed as a statue, not a wearable costume in any way.
I can also confirm that the current design of the helmet does not allow wearability (in order to achieve the pose ability it requires changes that don't allow it to be wearable) and the feet will likely be solid (they are on the prototype).
Assuming the reversible knees feature (which I love!) makes it through production, the only pieces that would potentially have magnets will be the knees and the chest panel with the LED (for battery access), possibly the thumbs for blaster assembly, depending how they do the final production of it. Every other piece will be a permanent part of the statue via blocks/keys that lock each element to the body form below.
Hope that is some help!
best,
Tom