This isn't the first one of these cards from this era to ignore EX. I wouldn't put too much thought into it if I were you.I actually wonder if Scoop Up Net is an indication that there will be a drastic reduction in the scope of Expanded at some point soon - though removing EXs would mean removing XY as well as BW, which would be *very* drastic...
On the other hand, any chance they change the language that is usually:
... A GX or V Pokémon
... A Premium Pokémon
Or something like that? Make up some new word for "non V/GX/EX" Pokémon, or the inverse, and then use that going forward?
The argument against doing that is that having older cards specify GX/EX only means that V Pokémon are immune to them - think Great Catcher - which helps with powercreep and encourages playing new Pokémon with new sets; but I don't think they necessarily intend to have the impact on Expanded that it sounds like they will with this kind of thing now...