I agree! Though I think we do this mostly.
I'm Australian, and I proof and post almost every news article that goes up on the site. I generally do try to keep an eye on it, but some do slip past me. Also, unfortunately, we often are only given a NA release date when we get sent press releases/research info, so information for other regions just isn't available. I suspect there have been some articles though where, when we only have a NA date, we don't specify a region.
We've actually made a concerted effort over the past year or so to include more dates for other regions. 2+ years ago, it was pretty much exclusively NA dates posted. We'll continue to try and up our game! Thanks for the feedback, Maxx.
Edit - Oh, to clarify: Getting release dates for regions other than Europe/NA is pretty much unheard of. So, when I'm saying we "already to this mostly" they're what I'm talking about. Though Europe and Oceania tend to share release dates.