So.
About Stronghold update - In acts you will find new icon representing asteroids. These are mining stations that you can conquer. Fight is tough so don't think you can do this at level 1. After conquering mining station it is now yours and can be accessible from hangar or star chart. Mining stations provide you with crafting materials. Stations can be upgraded with same materials. As mining stations are very powerful enemies also will want to invade them and take them from you. If you die while defending your station it is lost. If you exit game while station is invaded, you lose the station.
New:
-New crafting materials - Viridis, Rubrum, Caeruleum.
Drop changes:
-Enemies no longer will drop equipment items, only crafting materials.
Crafting changes:
-Blueprints will always drop from boss encounters
-Updated new recipes
-Blueprints now drop in tiers 1, 2, 3.
Game changes:
-Upgrading items no longer can be destroyed.
-Update all systems for more stability (Might need to start new game)
For best experience start new game!