maybe all creatures should run faster than players?
you will think twice before attacking them. now it is save. you can always run away.
Running away is an appropriate IC solution to problems. I don't see why it should be disabled altogether. It still exhausts you and you might not be able to run far enough, unless you are a ynnwn with light armor :-P
Sometimes running away wouldn't help, because the creature killed you before you were able to turn and most of the times running away helps now, is actually because the creatures get stuck at corners. Of course, this IS something that is VERY difficult to fix, but something that is thought of and put in some todo or wishlist, I guess.
Having more active NPCs is something nice though. Rats and Rogues run after me already and rogues are quite fast (if they wouldn't fail at taking corners).