I didn't like Fallout 4 that much.
Hopefully they don't adopt the "limited money" system for shopkeepers. I pick up anything and everything when I roam around, and it frustrates me that I can't sell all of them because the vendor doesn't have enough money to buy them.
And I've always hated crafting. Makes the game longer than it should be by forcing you to gather X materials just to craft something you're going to throw away after 5 hours because the item is already too weak.
I do like the characters in Fallout 4. I enjoy talking to them, even if they are pretty stubborn and unwilling to compromise especially when it comes to their morals. But that's just bad writing. Too bad the storyline ruins nearly everything, especially at the end.
Maybe the one thing Bioware can pick up from fallout 4 is the type of hairstyles it gives you?