It took me forever to finally beat the game, but I just did it. And holy fuck what a mess some of that end game stuff was.
>Final cutscene just abruptly ends and goes to credits with the Ed Sheeran song out of nowhere. No smooth transition
>AI professor's shift in personality is clunky and seems like they wanted her to both be the "stand in mom" and some sort of super cool evil robot villain and they just don't mesh or shift coherently between those personalities
>Area Zero was super cool the first time I entered, but then I realized it was pretty bland and filled with almost entirely the same Pokémon the whole way down
>Tons of glitching in area zero with Pokémon walking into walls, the characters following me falling off cliffs, etc
>It felt more like a slog to get down to the bottom rather than a reward. It didn't feel like a dungeon, just a press ZR simulator with a lot of going into my boxes to switch out the Pokémon I was sending out
>Because each story was treated equally, the E4 just feels like an extra long gym instead of actually being the final challenge. It wasn't difficult, it also came on and ended abruptly, and the build up to it was really lame. The fact I can't rematch them is bullshit as well

There's tons of evidence this game was rushed, but this whole end game section just proves to me how not only was it rushed but they had a lot of ideas and they just could not have somebody go through and trim the fat. It's just such a fucking mess