the amarr logi actually has to be buffed. it is the only suit with less PG than its racial assault brother and it has low amount of slots because it pays TWO slots as tax for a sidearm at proto levels.

now the problem: the sidearm is not available until proto making the suit weaker and actually the sidearm is not worth that much when you can run with an AR that is superb at all ranges.

And yes, we know that one day there will be plates with no penalties.
Armor plates without penalty? In what world are you living? They give you more HP then shield extenders and still offer you other things in the high slot. You cant have mobility and craploads of HP on armor. Shields are designed to be quick but less HP then armor. You have to think about it that in 1vs1 encounters armor is a better advantage cause you can take more bullets at a time. On the other hand shields are popular due to their fast recharge time. Most experienced players would pick armor+damage mods over shield without damage mods.