Wait, Final Gambit Shedinja is a thing? Well then, that's a new one for me.In all honesty, I had forgotten about those two. Nevertheless, GF's trolling is nothing new; Rotom-S "double immunity" and Final Gambit Shedinja have always seemed to be a sign that GF doesn't take itself too seriously.
As for post-game content... it still has more than, oh say, Ruby and Sapphire (and of course, Gen 1 with its one thing to do as post-game content, catching Mewtwo). One new town with the Battle Maison, two stationary legendaries to catch, one roaming legendary (albeit one that becomes stationary, which admittedly was weird). I'd say that puts it smack dab in the middle of the post-game spectrum. In my opinion, as far as amount of content available post-game, Johto > Unova > Sinnoh > Kalos > Hoenn > Kanto with respect to the original pair of versions. Third versions (or sequels in the case of B2W2) do tend to have more content available than their respective pairs, so if we see a Pokemon Z, it'll probably have a more respectable amount of post-game content.
And yeah, it's not the worst, but regardless, I'm not bothered by the supposed lack of post-game content in X/Y. The Battle Maison itself trumps the Tower/Subway in terms of what it can offer, so I'm fine with what we've got. And yes, whatever sequel/remake we get will definitely include more post-game. With the empty space in the region, we could easily get more areas the same way B2/W2 added areas. Then we can bring the Couriway Town train station in the equation, so the next games have a lot to draw upon.