Ah, this!
Allow me to pull from the discussion held on this in another channel; this more or less should sum up the team's view towards this subject.
[quote>>]I've always preferred to say that the limb has better dexterity and feeling; so it isn't perfect but it is surely better than other mechanical limbs (which, if done right, should actually be very crude and poor for any means of combat). This is because magic in general is much more flexible, so you're not just taking into mind what the nerves are doing to make the mechanics move, but the magic exerted into it to make it respond as well.
You would feel it just like you would feel someone touching your arm, whereas other prosthetic would only be felt if someone starts tugging on them. It also makes it easier to maneuver, since it feels more natural.
>>I'm not sure how to fully describe it, but the best description I can think is that you are using magic to effectively animate and 'make' the arm. Thus you feel the magic exerted there, and when something touches it you can feel that thing pushing against the force you are exerting. I don't even think that it would be overly physical in being jabbed in the robomagi-arm, on that note.
>>Texture and temperature wouldn't be felt.
>>People who have pressure related somatic movements aren't spinning around combat controlling their arm, it's very light, basic and blocky movements. Those nerves weren't meant to control fingers. If anything, you'd be able to move it back and forth, probably best to put like a claw on it or something cool that didn't require intricate motions like fingers. [/quote]
(These are snippets from a private discussion on this very topic)
So effectively this is the stance I garnered from that thread:
-Technomage limbs are superior to ordinary mechanical limbs, but still lack a fine amount of dexterity. Clumsy in comparison to normal limbs, essentially. Fingers will likely only be fit to hold objects. A good idea to put this in perspective is that normal prosthetics might be closing their fingers and once, whereas technomages would be able to move each finger, possibly with something of a delay. So you can move the fingers in a more intricate way, but you wouldn't be able to really tinker or do any fine tasks such as play an instrument with the limb.
-Like mechanical limbs, technomage limbs are incapable of feeling objects.
-While they cannot feel items, they can feel when something touches them (IE: Could feel a person placing his hand on the arm, or brushing into an object, but not actually feel what it is or most likely even discern it from shape.
-Most importantly, Technomages are the only ones allowed to make use of technomage limbs, as it requires magic to invoke a response (and because it's the rules.)
I will stress the fact that a normal 'robotic' arm isn't going to be a big plated super-cannon or fist like one might imagine, to be clear. Metal is heavy, and unless you want it ripping off the side of your body its best to go light. More often than not a prosthetic would look similar to the ones we have today:
And even then, that's modern technology-- odds are the WoW equivalent would be even cruder. To the point of the matter though, these limbs would be both extremely clumsy and more likely than not very lightly armored; heck, I wouldn't be surprised if most was made of wood or such instead of metal.
Just some excerpts from the GM team and some thoughts of my own.