I haven't been to the park this season, so if they've made advances in the theming this year, then I wouldn't know about them. In my view, though, there's been a dip. Look:
England: replaced Pirates with Elmo. Not English. I understand Pirates is back now though, so that's good.
Scotland: kilts, though honestly Scotland has never had much of an identity. It should have one, though.
Ireland: by far the worst offender. I don't count Europe in the Air as a plus for the theming, because it is in IRELAND. They dropped an Irish show for a "Europe" show (which isn't any good). They had Elmo in the place of what used to be a killer Irish themed show. Then they replaced Elmo with a Celtic Fyre show...but Celtic Fyre is decidedly less "Irish" feeling that were Emerald Beat and Irish Thunder.
France: Imaginique is gone. Kinetix was not French. I understand that Royal Palace is looked at as sort of a non-country area, but it's not exactly like they've out anything great in there, regardless of country.
Germany: no problem, actually, although, some things I've heard about the Oktoberfest changes have been less than flattering. Still, I'll reserve judgement.
Italy: You have an italian theater suitable for an Italian dinner show. What do you put in this space? Some rainbow colored chefs? I know, they play "Italian standards" but I mean, if Chuck E. Cheese starts singing African folk-music, does that make Chuck E. Cheese an "African themed" restaurant?
I think mostly I am disappointed by what I see as missed opportunities. If you're going to replace something, replace it with something better. If you're going to have a theme, get the most that you can out of it. What separates a true theme park from one of the many amusement parks that masquerade as theme parks is devotion to the concept. If I were giving out grades, it'd go like this:
Magic Kingdom gets an A.
KD gets a D-.
I'd give BGW a B-.
The only problem with that, of course, is that I think it's got B+ potential.