Currently, the shock coil is a 1-slot internal which provides a 100% reduction to fall damage.
In the planned update to Hawken, the advanced shock coil is a 3-slot internal which provides a 100% reduction to fall damage (the 1-slot version provides a 33% reduction and the 2-slot version provides a 66% reduction). This change is unnecessary.
Fall damage is insignificant and easily avoided. If you press jump or air-dodge before you hit the ground and you've successfully avoided 100% of the damage. If you don't, fall damage is low enough that it can generally be ignored.
The shock coil's main benefit is staying off radar when moving around the map. Instead of using fuel to jump or air-dodge which puts you on radar, with the shock coil you can avoid the fall damage without revealing your position on radar. Even then, this benefit is niche and highly map-dependent. On maps with large vertical drops (e.g. Origin) it can be beneficial, whereas on maps which are very flat (e.g. Bazaar) it can be useless.
Making the shock coil a 3-slot internal changes if from niche to bad. The 1 and 2-slot versions are useless because you still need to appear on radar to avoid all fall damage. The 3-slot shock coil simply doesn't have enough impact to make it worthwhile compared to other options available; I don't think I would even use it on the predator.
Edited by brackets, 25 February 2017 - 06:01 PM.