That all sounds reasonable, in terms of reasons for the King to stay. I'll probably piecemeal it as it matches up well with the posts.

As far as shrinking down... It isn't so much a matter of comfort as it is that the King is stuck right now. He's never consciously shapeshifted before, and, up until the villagers tried to grab him, it has been so gradual as to be unnoticed. It's going to take him a bit of time, and maybe getting stuck on/in something, before he can return to a more natural size.

I think I've got enough to write the post at this point. Now all I need is the time...