After reading several people complaining about the difficulty, I want to similarly plead for you
not to change anything that makes the game "harder". Even without mods Terraria is a joke on normal, and will always be no matter what one does. If anyone
is using mods then they can address any balance issues with +difficulty mods (such as enemy prefixes). I'm playing a 10+ mod run atm, including Blue's Magic, Calamity, Thorium, Tremor, this mod, and others. I'm level 90, with exp gain at 100%, damage reduction at 0%, and level cap at 100.
This mod is no where near the level of breaking the game on expert and none of the classes are my best accessory. Even when they are (they are in mid-game), it's not op against any bosses. None of the classes allow anyone to just steamroll any of the hard-mode bosses. They certainly are nice though, and do allow more room for player error against the bosses, which I would argue is one of the points of having a mod like this installed. The main point of this mod, to me, is that it's interesting, adds a mob/boss drop that's not useless no matter how far I am in the game (still need orbs on my level 90), and gives me a decent accessory at all points of the game. I hate vanilla Terraria's accessory options sometimes as there are points where there's nothing equal tier to your armor.
Thanks for the mod Saerus. It's one of my favorites. If you do decide to add/change difficulty in the class mod it would be sweet if it was optional at the least.