The expansion DLC is out! Here are the patch notes:

DLC FEATURES

• New ability menu with 7 commander powers
  
• Mutator structure poses strategic dilemmas
  
• Hive crawler alien in Ironman and Hunt missions
  
• Extra-challenging Ironman skirmish mode and weekly challenge
  
• Campaign integration for abilities and hunt missions
  

MAJOR

• Commander powers can be used by everyone in weekly challenges
  
• Mutator structures appear for everyone in weekly challenges
  
• Revised Tension mission to be easier
  
• Added patrol command
  
• Made life support shared damage affect shielded marines
  
• Tweaked costs of several items
  
• Made minigunner more vulnerable
  
• Changed ammo supply not to drop as much ammo
  
• Fixed bug with infested turrets that was making them useless
  
• Halved fire rate of infested turrets (compared to marine turrets)
  

MINOR

• Made mimic eggs slightly more vulnerable to grenades
  
• Made infested marines higher priority targets
  
• Made medi-pods higher priority targets
  
• Reduced infested officer inspiration duration
  
• Improved target selection for burrowing hive
  
• Made spore mines unable to respawn if hive is damaged
  
• Increased respawn time of spore mines
  
• Reduced damage of spore mines
  
• Buffed Assassins mutation with infested snipers
  
• Removed Assassins mutation from easier difficulties
  
• Made minigunners less effective against barriers
  
• Added speed and armour bonus to inspired flamers
  
• Made respawn happen even at points with dead bunkers
  
• Changed AI and infested marines not to switch targets if they already have an important one
  

UI

• Added game option to hide idle unit alerts
  
• Added game option to reduce size of announcements
  
• Added visual indicator for which marine will be tasked with building
  
• Added tips to important entities
  
• Made all random missions point to marine spawn at the start
  
• Added tooltips to custom level menu
  
• Removed "Command Cancelled" message for chained commands
  
• Added double-click "by type" marine selection
  
• Added shadow to tech station icon to help recognition
  
• Added ammo number to the UI
  

FIXES

• Stopped marines from getting stuck as much
  
• Fixed campaign mission UI on extremely wide resolutions
  
• Fixed crash issue that happened if switching resolutions during a game
  
• Fixed UI issue with ammo upgrade and switching resolutions
  
• Fixed date display issue for daily challenge at end of year (if week # warps over)
  
• Removed OpenAL32.dll from game folder. Steam should install its own version
  
• Optimised bug swarming slightly
  
• Fixed bug with guardian mouse-over