The series has been slowly evolving over the past few decades, introducing new features, shaking up old ones, and, most importantly, changing its approach to region design.
Perhaps the biggest deviator from tradition in this regard was, as they introduced fans to a full-blown open-world region followed up by two sizeable DLC areas.
Of course, it is great to see break tradition and give fans something fresh to look forward to. With the next mainline game in the series, which will be Gen 10, on the horizon, it's clear that even more work needs to be done to innovate on the foundations the series has dogmatically relied on for so long.
In fact, Gen 10 must fix biggest problems, many of which were actually introduced by. While many of those games' largest issues, such as performance, will undoubtedly be fixed by virtue of the Switch 2's more powerful hardware, one feature needs to be removed entirely in order for Gen 10 to be truly successful.
biggest problem, outside the atrocious performance at launch, is its open world. Simply put, it is not good. The largest problem with open world is its structure.