When fitting for PvP, there are typically 2 modules that are ubiquitously needed:
A.) A prop mod.
B.) A tackle mod.

When tanking a ship for PvP, there is typically one module that is ubiquitously used: A DCU.

This is how it is now, this is how it will be in the future... and your entire diatribe on shield vs armor and caldari tanking is completely irrelevant to this.

Amror ships sacrifice speed for tank:
Armor plates increase your align times and decrease your speed... making you slower...
Armor rigs decrease your speed, making you slower....
Propulsion upgrades like nanofibers and overdrives compete for low slot which are used for armor tanking...

Armor tanks sacrifice dps for tank:
Armor tanks require significantly more PG, which often requires reducing the size of your guns, and hence your dps.
Weapon damage modules compete for low slots which are used for armor tanking...

In contrast, shield modules and rigs don't come with speed/agility penalties. They don't compete for lowslots, which can then be filled with damage and propulsion upgrade modules, and they are typically aren't PG limited, meaning fitting weapons is easier.

And none of this is changing with retribution. Retribution is IMPROVING missiles, by taking away t2 ammo penalties, by allowing TE's and TC's to improve missile damage, and by allowing all missiles skills (like guided missile precision) to benefit all missile weapons (like torpedoes and Heavy Assault missiles). Sure, you lose some range on your heavy missiles, but you have to be ignorant to think that the upcoming changes are overall bad for missile users....