I would love for them to be more unified somehow.
For example: ordering them in weapons>shield>armor>hull and having
similar icons with different flavour.
-Advanced Optics would be
a gun with a crystal at the end.
-Advanced Turret gyros would be the same icon but with
speed arrows instead.
-Armored Weapon Mounts would be the same icon but with a
shield symbol.
-Integrated Point Defence AI - same
a gun with a laser painter/pointer on top.
-Integrated Targetting Unit - same with an aiming circle icon.
-Expanded Missile Racks is good right now.
-Expanded Magazines should have a very similar icon as missile racks but with bullet rounds rather than missiles.
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-Extended shields would have two arrows at the sides pointing outwards.
-Accelerated shields would have the same icon but with
speed arrows.
-Hardened Shields, same but with a
shield icon.
-Omni Shield Emitter - the standart shield graphic with
cycling arrows.
-Stabilized Shields - the same standart graphic with a
power icon.
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-Heavy Armor with that
shield icon.
-Reinforced Bulkheads same as Heavy Armor but with an arrow pointing upward instead of the shield icon.
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-Augmented Engines would have a speed arrow.
-Auxiliary Thrusters would have the same icon as Aug. Engines but with side arrows (like Ext. Shields)
-Insulated Engine Assembly would have the engine's graphic with the
shield icon.
-Automated Repair unit would have a wrench icon.
-Flux Coil Adjunct should just have the Back To The Future flux coil icon with an arrow pointing upward.
-Flux Distributor with the same icon but with speed arrows pointing sideways (like Acc. Shields).
-Resistant Flux Conduits - the same Back To The Future flux coil icon with a
power icon.
BASICLY the shield upgrades would have the same graphic for all of them but the mini-icon inside would change depending on which upgrade. The same goes for weapons and engines/flux coils/armor.