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The alola games will be thought of similarly to diamond and pearl: good games that really suffer from technical problems. The cutscenes that people complain about wouldn't be nearly as big of a problem if the game didn't have to fade to black all the time and the animations weren't all so stiff.
Things like separate text boxes when you receive multiple items at once and the animation of taking out and putting away the fishing rod every time you use it will be the "saving a lot of data" of gen 7. The in battle fps drops are similar to the slowness of the gen 4 hp/exp bars.
Also like diamond and pearl, the games did a lot of things right. The introduction of more side quests in the ultra games is something pokemon has needed for a long time. But unfortunately, once we get a few games into the future, gen 7 will seem nearly unplayable because game freak was overly ambitious with the capability of the 3ds