One issue that was brought up, mainly in the NintendoLife video, is the performance issues with the game. The videos from the people that played the English version of the game, said that they were playing on an older build, as the previews from the Japanese videos don't appear to have the same performance issues. However, the "this is not the final build" statement is worrying, given that it's bringing flashbacks to Battlefield 2042's beta, where DICE said that it is on a 3 month old build of the game, and we all know how that game turned out. It also resembles what happened with the My Wedding Stories Game Pack for The Sims 4, where the devs and EA Creator Network people, said that the extremely buggy game footage was from an earlier build of the game, and not in the final version of the pack, and yet all of the bugs were in the actual release of the GP.
Also, the videos included pre-provided footage from Nintendo/Game Freak/TPCi, as content creators were not allowed to record footage of their gameplay, to prevent leaks. Joe from Serebii mentioned that he found a Shiny Skiddo while playing the game.