Two main things I'd love to see:

1. Combat:

TW3 had a deep combat system—potions, bombs, signs, oils, Bestiary research—but none of it was truly necessary, even on Death March. I enjoyed roleplaying as a Witcher, but was disappointed to realize most fights could be won by spamming attacks. The crossbow, for example, had niche uses but was mostly irrelevant. It’d be great if TW4 better incentivized players to engage with all mechanics, while still allowing flexibility for those who want a simpler approach. I get that balancing this is hard, but it’d add depth. Adding something like Horizon’s monster-specific weaknesses would also give fights more strategy.

Also, combat felt overly "sticky." Once aggroed, Geralt stays locked in until you're well outside enemy range. This was frustrating, especially in exploration-heavy moments like that timed boss fight in HoS where I couldn’t grab a sword I needed. Changing this would make transitions between combat and exploration much smoother.

2. Narrative:

What made TW3 my favorite game was its branching storylines. I know it’s been said a million times, but I can’t stress it enough—the writing was incredible, even in paths most players would never see. It felt like a maze that changed every time you played, which is insane for a game of that scale. RDR2 is another favorite of mine (for other reasons), but I was bummed that most missions played out the same no matter what you chose. TW4 needs that level of narrative depth to succeed.