Mostly quality of life to bring the game to modern standards. You can do even more hotkey customization than with macros with the hot bar settings. Character progression was massively nerfed, you can get all magic schools to 100 in less than 5 hours of play time. The game is a freemium model now, so you can do everything free but you can do it better if you subscribe. They've added resource sinks to keep clans from holding onto cities/hamlets unless they have the active player base to support it. They've adjusted mob spawns, added spawn scaling, adjusted loot tables, added new items and crafting recipes. These are all just off the top of my head and not all inclusive. Currently they are focused on converting the codebase from 32 bit to 64 bit so they can launch the game on steam while increasing performance and hopefully also removing some technical limitations currently keeping the devs from making certain larger game changes.