Dual tanking isn't the problem, the lack of meaningful options is.

-Minmatar scouts are described as hand-to-hand specialists but would never use Myofibril Stimulants because it directly competes with their logical tank source.
-Amarr are supposed to be endurance runners but Cardiac Regulators are low slots and they don't wan to give up their tank.
-The Gallente make frequent use of afterburners in EVE and the Dust equal is Kinetic Catalyzers but they are low slots so they disrupt tank and have very difficult fitting requirements.
-The Caldari scout would make the best use of Precision Enhancers but they interfere with shield tanking.
-Passive scan modules in general aren't worth much to anyone other than a scout as base scan ranges are so short and the bonuses aren't enough to make up for it.
-Codebreakers are Gallente tech but not Gallente would ever use them because they are low slots and yet its the Minmatar that gets suit bonuses to hacking.
-Where is any Engineering modules? Currently we only have PG upgrades while Electronics has profile damps, precision enhancers, range amps, and codebreakers.

Here is hoping reduced TTK will give folks the courage to mix it up a bit. The fact that other modules are not very 'sexy' doesn't help.

The one thing I find strange about Dust is the way profile signature seems to be this big inconsistent and .

For instance, I can play peek-a-boo with another infantry player as we both dance around a large crate or something. My passive scanning skills are decent and even though I cannot 'see' the other character, I can see his chevron and the direction he is moving.

Now take the same situation but substitute the infantry player with a HAV. Here is this monstrous vehicle roughly the same distance as I hide behind some cover. Not only can I not 'see' any indication of the vehicle on the other side of the obstacle, it doesn't even show up on my mini map. It's ludicrous.