I'm not opposed to the home base formula but it also has its drawbacks. Going on a journey worked because, like the games, it was the ultimate kid's fantasy. You got to leave home, see different sights, and take down corruption. However, that formula had the drawback of having certain generic stories like getting lost in the woods, an episode about a snowy area, not to mention how at times it could be a little odd how problems don't get fixed until the heroes happen to arrive. Also, it could take a long time to get to certain towns and cities.
The home base formula makes it so that the heroes can just go to a place without the in between stuff but it removes a very important aspect of Pokemon, something even Pokemon Go had, which is travelling. Not to mention, this formula caused the Galar Gym leaders to get the shaft