Ira, thanks.
That's why VK's question is interesting (though perhaps relying too much on the charming recurring categoricals conceit), ie because, judging from those like you and VK who know and love the course, if GH can restore the original design the results will be outstanding; which means, it seems to me, that no single golf hole like the 16th can and will be allowed to mar and diminish the total effect. Those in charge don't want that, and I can't imagine GH wants to leave behind a weak hole and be associated with it for years to come, even if it can be justified as 'original'. Again, I'm just surprised that we might think otherwise, ie that GH won't find a way, indeed several ways, to markedly improve the 16th hole while staying within/honouring the ostensible mandate. As you and others have noted re original design features that weren't built (or perhaps, we'll find out, weren't built as intended), there is much room for expert interpretation and creative licence.