Objectively
>Space Marine wank
Space Marines were always the stars of the setting, but at this point they're a cancer and I wouldn't be surprised if the Imperial Guard or Sisters of Battle were discontinued or turned into more space marines.
>Chaos wank
Having a billion antagonists doesn't matter if only one is an actual threat. Chaos, Tyrannids, Necrons, Orks, and Tau should all be indirectly working together (from a meta story perspective) to provide antagonistic forces, but instead it's just Chaos. That's all that matters. Everything else is just an annoyance.
>it stopped being a wargame, and started being "collectable"
Nobody can afford shit if it's priced like an investment and players are constantly told old models are no longer supported and they must buy new models because uhhhh new models.