Black Desert's Project Manager Belsazar has revealed details of what's new in the first closed beta in December. You may have known that new Tamer class will be playable, along with new region Calpheon and new level cap. There are many other new stuff actually, and you can see what they are below.
New night effects are added and in CBT1 you'll get darker night and stormy night
When the night cycle kicks in with clouds moving in front of the moon, you will require the use of lanterns, which you can purchase from NPCs. The developers are also working on a ‘craft-able’ version of the lanterns, including oil that will allow you to extend their use.
You can swap between walking and running in CBT1
You do have to keep the CAPS LOCK button pressed, but developers are looking into the possibility of this feature being switched ON/OFF with the CAPS LOCK button.
New hairstyles and skin colors
New skin colors
New hair colors
New Beard Styles (Male Characters)
New Bald Haircut