Animations are much improved, especially lip movement of npc's in conversations.
Quests actually work, which is always nice

Some quests have been updated to be doable as a team (so if you're in a party, one member can complete an objective and it's completed for the whole party).
The dye system is great: you unlock dyes by completing various achievements and once a dye's unlocked you can apply it to one of 3 slots on each piece of equipment.
It's now possible to pick up items and pieces of equipment that are lying on the ground, just like in previous TES games, but, if the item is owned by an npc, picking it up is considered stealing and if you're spotted you get a bounty and either have to pay it or get attacked by the guards

Unfortunately, there's still no Thieves' Guild or Dark Brotherhood, but those are coming in a future update.
They're in the process of expanding all the dungeons, making them far more elaborate, but so far they've only done a few, more to come in future updates
