1. Bring back the original controls from the first installment of the series, including:
- "aggressive" and "sociable" modes
- "walking slowly" and "sprinting
2. Give players the option to crouch on demand, and not only in cover.
3. Do something about AI: it's a joke!
4. Let players interact with NPC's freely. I need to be able to pick a fight with a random pedestrian: don't treat me like a baby!
5. Spend just a little more effort making all islands accessible.
6. Make finding enemy ships more difficult to find and more rewarding to loot.
8. Slow down the clock and add a consistent day-night cycle. Also, add some type of a clock to the HUD, so that players can plan activities accordingly.
And that's about it! Why would that help? For me, giving the character more movement options helps me get in character and adds to the feeling of immersion. For example, if I want to play the game more slowly, the character standing straight up once out of cover ruins the stealth experience for me.
And yeah, I stopped playing at about 40% completion. Too busy these days.