Honestly, my biggest gripe is that they feel like a deliberate attempt to one-up their original counterparts. Like you know how Alolan Sandslash has 20 less special attack compared to normal Sandslash to add 10 points to each of its defenses? Or how Alolan Ninetales has 9 less attack compared to normal Ninetales for 9 more speed? Heck, some of it might not have to do with stats. Alolan Marowak actually has a use for the ability Rock Head with Flare Blitz, but what does the original Marowak have? Double Edge.
Even in generation 8, Galar Weezing is the same Pokemon, but it now has a fairy typing which is among the best typings in the game, and what's its drawback? A weakness to steel? In exchange for immunity to dragon, and a resistance to dark types, even more resistance to fighting types, and even more resistance to bugs.