>>48938537This.
Presplit: Pokemon can be trapped in the “wrong” type (physical attacker with a special type or vice versa)
Post split: having two good attacking stats is no longer an absolute requirement for certain coverage options making mixed attackers objectively pointless most of the time.
But like you said the bigger problem is the system being flawed and it has only gotten worse
The new EV/Nature system means that Pokémon need to specialize
Base Power Creep means moves overall are much stronger, making good Pokémon. completely broken
Movepool favoritism: Pokemon being given extremely good movepools despite all ready being good or extremely bad movepools despite already being useless. The main benefactors tend to be Kanto Pokemon but there are exceptions)