New Features
Support for add-ons
Additional art customization added to Workshop:
Super Mutant clutter including meat totems, meat bags and meat cart
Raider clutter including raider poles, cages and tents
Abstract and portrait paintings
Variety of new signs
More metal and wood doors variants

Fixes
General stability and performance improvements
During “Getting a Clue” quest, Kellogg’s desk will remain a working container
During “Rocket’s Red Glare”, resolved issue where companions could not be dismissed after completing the quest
Fixed an issue with “Kremvh’s Tooth” quest item not spawning properly
Settlements under attack will now display an updated message with the results of the attack if player does not respond
Fixed an issue with screen effects not clearing away properly after using a scope
Fixed an issue with trying to sprint while in third person with a minigun equipped
Rank 4 of Demolition Expert perk now properly increases the area effect of explosives
The Scrounger perk now includes additional common ammo types
Fixed an issue where Calvin Whitaker would disappear in Vault 81
Fixed an issue where Ninja and Sandman perks combined would apply the incorrect damage bonus
Fixed an issue where Rank 3 of Grim Reaper’s Sprint did not fill critical meter properly
Fixed an issue with key cards not spawning correctly in Vault 75
Fixed an issue where enemies would stop spawning during “Airship Down”
Being in first person while wearing power armor and quickly switching weapons will no longer cause the Pip-Boy to be stuck
Fixed an issue with the autosave counter getting incorrectly reset
Fixed issue that would cause the Pip-Boy menu to turn invisible while swimming
Fixed an issue where scrapping larger quantities of a single item would inadvertently scrap a legendary item
Fixed issue where exiting workbenches would cause third person to stop working properly
The Scribe can now be assigned consecutive settlements properly
Fixed issue with duplicating scraps shipments
Fixed issue with vendors not properly exchanging caps after several consecutive transactions in a row
Fixed issue with the quicksave and autosave message persisting through loading screens
Fixed an issue where updating to the latest patch would cause Options settings to reset back to default (Xbox One)
Fixed an issue with loading save with a placed object in water, not properly floating

And here is how you can get access to the beta patch.
Log into Steam
Right Click on Fallout 4 in your Library
Select Settings
Select Betas
A drop down menu will appear. Select Beta Update
Select OK
Wait a few minutes and Fallout 4 should update
When done, Fallout 4 should appear as Fallout 4 [beta] in your Library