The feature I would most like to see added is safe mode that stops you not when a hostile creature enters view, but rather when a hostile creature actually appears on the screen.
There have been so many times I turned off safe mode while travelling a long distance because I could see some creature really far away… and then as I’m moving quickly, suddenly something else shows up on screen and attacks me before I realize they’re there and release the key. I have to either risk that or be annoyed by having to carefully move slowly while travelling long distances. I think feature to solve that problem would improve my enjoyment of the game more than any other.