Boo!
Still there is nothing wrong with this setup?

This is not a such a bad idea. Obviously needs a bit of balancing though. +1

Great ideas but it's just adding more complex stuff for the servers to deal with. I retain the idea that reppers as well as the new plates are moved to high slots.

I'm the worst shot in the world and I fear nobody who isn't a Caldari suit. I'll just say that much.

I'll show the power of flux nades and a MD.

I think infantry should come up with a new term that doesn't include tanking. So we can avoid confusion.

The only problem with this is that shield tankers are still going to benefit from plates more than armor tankers. We need armor tanking suits to have armor related bonuses to give them an edge or all we'll be doing is adding more buffer to shield tankers.

The strength of Armor setups in EVE lies in their qualities for taking reduced damage (both through resistances and low signature size) and high HP, which lend themselves very well to spider tanking. Armor is generally more resilient than shields under fire and thus excel at brawling, while shields is vastly superior in skirmish scenarios.

Additionally, dual tanking is discouraged by sheer virtue of fitting requirements; Shield extenders eat a lot of CPU, something Armor ships have little of, while Armor plates take up a lot of PG, which Shield ships only have in scarce supply. Which means you can't fit many, if any, weapons.

So the solution isn't so much giving suits bonuses to module fitting reduction, as it is matching suit fitting to module requirements.

An example; the numbers are just there to give a rough idea:
Say an Armor suit has 50 PG and 150 CPU, a Shield suit has 30 PG and 250 CPU, an Armor plate takes 20 PG and 30 CPU, and a Shield extender takes 10 PG and 50 CPU.
The Armor suit has greater ease fitting the Armor plate, as it takes 1/3 of its PG and 1/5th of its CPU. It has trouble fitting the Shield extender, as while it only takes 1/5th its PG, it takes 1/3rd of its CPU.
The Shield suit easily fits the shield extender, as it only takes 1/3rd of its PG and 1/5th of its CPU. It has trouble fitting the Shield extender, as while it takes less than 1/8th its CPU, it takes 2/3rds of its PG.

In either case, you can still dual tank, but it comes with a massive cost in firepower, and the need for fitting modules (a good, non novelty/gimmick fit, shouldn't need to waste slots on fitting modules).

This alleviates the issue surrounding Armor modules being more useful for Shield tankers.

e: Yes, there are cases where fitting Armor to a Shield suit or vice versa is a viable option, but even then you don't dual tank.