Haven't played the previous versions so I can't say what's new and interesting compared to the previous ones but as far as I can tell its an incredible good build! I haven't had any issues with ctd's, FPS problems or instability problems. Fantastic game, by the way and as for suggestions: Perhaps make the crafting system a bit more intuitive, at the moment, at least from personal experience, its one of the more difficult systems to engage with initially.
A second suggestion is to go into more detail on some mechanics, making them even more accurate to how it is in real life and adding to immersion.