>>47144800Physical/Spec Split was an objective improvement because it allowed for more moves/niches to exist. Here are two things that actually made the game worse.
>Coverage FavoritismIn earlier gens, most Pokemon only got STAB, Normal, and one or two coverage moves of their preferred attacking stat unless they were Normal or Psychic. Game Freak is now allowing more Pokemon get more diverse movepools but are clearly playing favorites over which pokemon are allowed to get type coverage (This also applies to utility and boosting moves)
>Minmaxed Stats/ Defense Creep/ Game Freak keeps creating new Pokémon with higher and higher offense stats, Additionally they creating moves with higher and higher base power. This makes it harder for Pokemon in general to take hits. It's gotten to the point where defensive stats are basically worthless unless they are extremely high or if the defender has a good defensive typing with several resistance (Not being weak to an attack often isn't enough any more, Pokemon now have to actually resist the attack to prevent being OHKO). This pretty much made Pokemon with balanced stat spreads obsolete unless they have extremely high stats overall or extremely good moves/abilities .