Sorry had to leave some out due to only being able to have 15 options.

Please give a reason as to why.

The better modules-
Energy Transfer
Nano Recharge
Stealth Enhance
Visor Enhance
Covert Ops
Blind Spot
Retriever
Mobility Enhance

Average modules-
Armor Enhance
Proximity Alarm
Aim Enhance
Loadout Pro
Detonation Delay
Weapon Pro

Crap modules-
Threat Tracer
Tracker
Cloak Tracker
Air Stomp
Side Pack
Jammer
Point Fire Enhance
Aim Enhance
Rapid Fire

Just my opinion. A lot of the modules are weak due to function (like Tracker, Threat Tracer), some are just weak due to numbers (Side Pack, Rapid Fire) and some are weak because the improvements they give arnt really needed (Aim Enhance, Point Fire Enhance) because the game has minimal ADS recoil.

why does Air Stomp need improvement?
i think it's pretty powerful all the way up to level 3...

however, i believe that the damage radius for air stomp shock impact is not a spherical radius but a half-sphere from the point of contact with the floor.... meaning, if u hit a ledge (i.e. small side ledge at City Hall's stairways) and someone is below you (but not directly below) but within supposed killing radius... he gets no damage...

changing it to a spherical should make Air Stomp an even more deadlier module

Its too situational to be serious module pick in my opinion. In the average game it wont benefit a player as much as Energy Transfer, Nano Recharge and even Armor Enhance will. Even in Crash Site Detonation Delay is a better pick than Air Stomp is because it will prevent you and your team from being frag/jaw spammed to death while holding the pod.

Dear god aim enhance is fantastic. Put that in average at least!

hmm but in my opinion air stomp 2 is useful in CTR & Extraction, especially for maps with alot of height.... i've shortened capture times by a lot with this module since there's no delay after landing from a high jump....and also i've lost alot of enemy trails with daring stunt jumps...
In TIA & IA its useful to get down and straight into the action like in Parking Deck and Skyline...killing with Air Stomp is just for pure fun.

e:g CTR in Sanctuary, jumping straight down to the lower level base, Extraction & CTR in downed bird, jumping straight down from the building to the basemant level area....extraction in wall street, getting stealth tick and jumping a great distance from the hole at the top floor... saves a lot of time.

Crash Site however is a different story, its not so useful here.