It's a good point, but as you've said, DX doesn't really mean what it did years ago. HT did the Luke Jedi, then Endor Luke, then DX Endor/sandstorm Luke, which were all pretty much the same fig with outfit add-ons and an extra modded headsculpt.
This one is indeed a reg and EX, but they may simply do a whole other release (even of a reg and EX again) that covers all the Dagobah stuff. There's just so much they could do with Dagobah in terms of outfit, accessories and amended head/hairsculpt, the Yoda+backpack only being the most obvious.