The update is 2.2GB roughly but what I have read so make sure to plug in that Ethernet cord to keep the downtime at a all time low!
First off this is good news because it is set to have the Automatron update live to all platforms very soon!!

Bethesda wrote New Features
1.Support for add-ons
2.Additional art customization added to Workshop:

3.Super Mutant clutter including meat totems, meat bags and meat cart
4.Raider clutter including raider poles, cages and tents
5.Abstract and portrait paintings
6.Variety of new signs
7.More metal and wood doors variants Fixes

General stability and performance improvements
1.During "Getting a Clue" quest, Kellogg's desk will remain a working container
2.During "Rocket's Red Glare", resolved issue where companions could not be dismissed after completing the quest
3.Fixed an issue with "Kremvh's Tooth" quest item not spawning properly
4.Settlements under attack will now display an updated message with the results of the attack if player does not respond
5.Fixed an issue with screen effects not clearing away properly after using a scope
6.Fixed an issue with trying to sprint while in third person with a minigun equipped
7.Rank 4 of Demolition Expert perk now properly increases the area effect of explosives
8.The Scrounger perk now includes additional common ammo types
9.Fixed an issue where Calvin Whitaker would disappear in Vault 81
10.Fixed an issue where Ninja and Sandman perks combined would apply the incorrect damage bonus
11.Fixed an issue where Rank 3 of Grim Reaper's 12.Sprint did not fill critical meter properly
13.Fixed an issue with key cards not spawning correctly in Vault 75
14.Fixed an issue where enemies would stop spawning during "Airship Down"
15.Being in first person while wearing power armor and quickly switching weapons will no longer cause the Pip-Boy to be stuck
16.Fixed an issue with the autosave counter getting incorrectly reset
17.Fixed issue that would cause the Pip-Boy menu to turn invisible while swimming
18.Fixed an issue where scrapping larger quantities of a single item would inadvertently scrap a legendary item
19.Fixed issue where exiting workbenches would cause third person to stop working properly
20.The Scribe can now be assigned consecutive settlements properly
21.Fixed issue with duplicating scraps shipments
22.Fixed issue with vendors not properly exchanging caps after several consecutive transactions in a row
23.Fixed issue with the quicksave and autosave message persisting through loading screens
24.Fixed an issue where updating to the latest patch would cause Options settings to reset back to default (Xbox One)
25.Fixed an issue with loading save with a placed object in water, not properly floating

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