If I'm not mistaken, game is 2D (or so called 2.5D, 2D faked to appear 3D) so making rotation is not that simple. While it's not impossible, it would probably need lot of time and effort, which could be used to add more content. Nice to have but not essential, IMHO.
I'm pretty sure that game, the alpha build at least, already takes those into account at least on some level when calculating how well you're hidden. It seems easier to hide in dark places, npc's spot you instantly/faster if your skill is not high enough and encumberance is supposed to make hiding in shadows harder (could not figure out if last part worked or not). Or do you mean something else?
Enemies chasing you to other zones might be nice. Now you can pretty much render places inaccessable by retreating from mob to other zone as they swarm you as soon as you go back.
Respawnin enemies are already planned but bit more randomness (monster placement and random encounters) would certainly be nice to increase replayability.