Great post, incredibly useful. Another thing that I notice is that they almost always have these extremely rounded corners, while genuine cards have a more complex cut shape.
These new non-holos are scary though, I can totally see newcomers being fooled by those, especially with someone pretending to have an “old childhood collection” or something like that.
They’re also definitely getting more common, I think I’ve already seen those a couple times here on E4, in the last months. Like this one (EDIT: that you already posted):
Fakers are definitely putting some effort into text and symbols, like they did in MTG where you can source genuinely elaborate fakes. With the amount of money involved we must expect even more of these, made with ill intentions and not simply to sell bootlegs in “good” faith.