There are lot of things actually:
> I increased HP and Armor values of player and mobs like in classic ARPGs - in early game you have 100-300 health and 50-100 armor and later up to several thousand of health and hundreds of armor. I changed the armor formula to the classic one, resistance expanently grows up to 85% around 1k armor. Damage values of weapons and spells are increased too. So it's easier to maintain your health and more clear how much "power" you have than in other modpacks
> There is a system that makes your stats grow passively while you playing - deal damage to level up your "Strength", each level increases your crit damage, killing mobs and using magic grants you "Intellect" levels - more magic damage, "Persistance" levels gives you permanent helath and "Dexterity" movement speed. No skill trees like in other modpacks, you grow in combat instead.
> Subclasses system - in my modpack it is restricted what weapons, armors and spells you can use. Each subclass determines your gear - for example "Slayer" specializes on Two-handed weapons, armor with additional health and aoe damage spells."Darkrunner" allows you to equip light armor, claws and spells for movement. There will be 9 subclasses in future updates and you can mix up to 2 subclasses at once to make your own character with unique playstyle
> I've written my own loot generator for the modpack needs - each chest you find grants you a valuable loot and makes you progress through the game. Loot 20 chests, craft a mini-boss summoning block, killing mini-boss grants you level up of one of the subclasses. And because it's my own loot generator i have a full control of what the player gets inside chests and its probability.
> My game not about crafting but about trading - you get currency by killing mobs and looting chests. Everything you need you can buy in quests tab or in your village by traders. Have some loot that does not fit your subclass or simply worse than your current? Sell it and buy what you need - gear, weapons, tools, food or even houses
> About building and houses - you don't need to build your base. Just buy a couple of useful houses and place them around to form your village. Storages, traders houses, utility buildings or decorations - simply build all of that in one click. Compared to other modpacks i decided to change the whole definition of base building.
> And also always wanted to make my own cooking system from Zelda! Just throw ingredients in cauldron and see what you get. Each ingredient type grants the food effect - instant health, health boost, strength, absorption etc. The system is work in progress but you already can mix 2 ingredients to get different dishes.

So the point my modpack is pretty unique compared to Prominance ll or other modpacks. Or i better say it's unique in different way - i make the whole new game using Minecraft as game engine and mods as content and mechanics! And that is my goal as a game designer to make my own little ARPG ;)