^It would be a little more complicated to do that, actually.
If they wanted to put the limited editions in regular 2CD cases they'd either have to completely reformat all the artwork or create a new page (maybe an insert?) for the regular CD Only booklet with credits for the DVD.
I'm more inclined to think, though, that if there are any OS presses of the limited editions, they are going to be as similar to the JP versions as they can be or there won't be any at all. There's just too much effort involved to make different packaging for a different market. The only people I've seen make that sort of effort are bootleggers: