I completely disagree with any method that is not finite to realocate stats. Why? Because I don't think that you SHOULD reallocate to begin with, I like it as a design choice that once you've put them in, you can't change them.
I am very sure they're giving us those Keeper's Hymn stones exactly BECAUSE they're fiddling a lot with the way attributes work, so until they're done they're giving us a chance to alter them, and then not anymore. At least that is what I am hoping for.