Well, TBC`s new distribution adds:

• Arena mode.

• Single or Coop arena mode.

• PvP mode redesign.

• No more mobs on PvP mode, now every 10 secs a new random item appears.

-New 1player or 2 player buttons added for arena mode.

-HP and SP potions now give 25% hp and sp respectively.

-Point combo multiplier downgrade from 100 to 10.
-Skills no do less damage in pvp and 2 player coop, but they are spammable.

-Skill`s mana consumption reduced in 50%.

• Skills travelling speed balanced.

• Archer skills now bounce of objects.

• PowerShot archer skill bounces till it reaches a target.

• Mage`s Fireball skill now has knock-back.

• Mage`s ice shard has a slow effect for 1 sec.

• Enemies have more HP but less armor.

• Enemies are faster Now.