New Skill called Dungeoneering (IDK) Its pointless so Id suggest not doing it.
A few more quests, Few more new items. Thats about it.
Dungeoneering Useless? Say that to
Chaotic Maul and
Chaotic 'Raper'
And as Everyone has stated the major ones, ill elaborate a bit more. the major updates have been as follows...
Constitution (Hitpoints) update. Hitpoints and Damage for all players and creatures were increased 10x. (99 Constitution = 990 Life Points. 24 Damage = 240-244 Damage)
Balmung Weapon. A new weapon that increases damage to all dagganoths. (Max hit = 1300)
Dungeoneering. A new skill for p2p and f2p, Venture threw dungeons by yourself or with friends / strangers to increase levels and receive epic items.
Barbarian Assault Update. You can now color whips and dark bows by spending 50 points in any role to buy an egg with dye in it.
More advanced graphics Options... Safemode, Open GL, Direct X etc etc.
Private Chat update. You can now change the color of your private chat.
Those are just some of the bigger ones off the top of my head.