The passive Defense Critical Chance has an integer variable displayed between 3-5% for Legendary gear. If you create a tower without any items on, look at the critical chance, and then equip the item you will notice that often the critical chance will increase by a non-integer value that rounds off to the variable displayed in the passive (ie Mystic has a base 3% chance, I equip a +5% weapon, and then inspecting the tower says I only have a 7.56% Defense Critical Chance). Please show the full Defense Critical Chance % in the item passive.
I suspect this is happening with Hero Crit Chance too, but cannot check that one as easily btw.