Frankly, this article didn't say anything new to me.
I don't think that any ruling for polymorph spells so far have succeeded in being exhaustive, there are always cases when the DM has to adjudicate a specific form about how it works.
Until a few months ago I was quite irritated by this fact, but nowadays I am not anymore, I simply take for granted that the DM judgement is required sometimes and that's fine. It would be nice if Skip acknowledged this fact and provided suggestions in specific cases or when specific incongruences occur (such as when you polymorph into a member of the same race and lose darkvision by the written rules), rather that trying to rationalize the rule for the general case, which so far has always left unsolved cases behind.
I like a lot the idea of having this regular articles on the WotC website, and I am going to print out several of them to keep in front of me during our sessions.
What I like less is the fact that often it seems to me that Skip's attitude is that of lawyering the rules as they are currently written, trying to justify afterwards what had raised an issue with "realism" or "balance" from part of the audience.