A little warm perhaps. Sweating even in mild temperatures. Wearer gets tired sooner. This is serious armor. It is unpleasant enough that most folks will not wear it unless necessary.
Movement is a test of the wearer's endurance.
Objective damage gets a little more complicated when alot of armor is involved. I deal with it by looking at how many points of damage were done versus the armor value of the victim and the scale value of the victim separately. This is a really piddly amount of damage. No harm done. The attack broke through the armor.