Easily one of the best expansion packs for a video game in the entire decade of 2010-2019. It really saves XCOM2 from mediocrity, and I can't imagine playing the game without it.

WOTC is not marketed right, because it adds so much more than just the alien assassin champions.

• You now have soldier bonding. Bondmates can train together in the training centre to level up their teamwork abilities. It's a useful force multiplier, but they're useless if they aren't together.
  
• You have to deal with soldiers' mental health now. They will accrue battle fatigue, and perhaps even PTSD if a mission goes badly. If your soldier gets knocked the ♥♥♥♥ out by a stun lancer, he may develop a phobia of stun lancers. You'll have to build an infirmary, and send him to the shrink's office.
  
• Three new neutral factions
  
• Covert operations with varying rewards, depending on how many resources and manpower you sink into them
  
• Monthly "special orders". You unlock orders as you improve each faction's influence, and you unlock more order slots in the same way. The orders can be anything, for example: +15% supplies this month, -20 hacking defence for all enemies, -50% rookie recruitment cost, or increased time limit on every mission. You can only have 1 order active at the start of the game, and can increase it via buildings and influence.
  
• The Chosen assassins are not as ridiculous as it may seem. They try to capture your soldiers alive. Rather than teleport and 1-shot everything, they usually try to cause bleedouts, or stuns, and to snatch the still living soldiers away for questioning. This is arguably worse than killing a soldier, because it progresses alien victory A LOT.
  
• A few new enemies, new mission types, scripted missions, maps, new cinematics etc.

Oh, and be sure to play with mods. The modding community has done an exceptional job as far as QoL and enemy AI improvements.

Easily one of the best expansion packs for a video game in the entire decade of 2010-2019. It really saves XCOM2 from mediocrity, and I can't imagine playing the game without it. WOTC is not marketed right, because it adds so much more than just the alien assassin champions. [list] [*]You now have soldier bonding. Bondmates can train together in the training centre to level up their teamwork abilities. It's a useful force multiplier, but they're useless if they aren't together. [*]You have to deal with soldiers' mental health now. They will accrue battle fatigue, and perhaps even PTSD if a mission goes badly. If your soldier gets knocked the fuck out by a stun lancer, he may develop a phobia of stun lancers. You'll have to build an infirmary, and send him to the shrink's office. [*]Three new neutral factions [*]Covert operations with varying rewards, depending on how many resources and manpower you sink into them [*]Monthly "special orders". You unlock orders as you improve each faction's influence, and you unlock more order slots in the same way. The orders can be anything, for example: +15% supplies this month, -20 hacking defence for all enemies, -50% rookie recruitment cost, or increased time limit on every mission. You can only have 1 order active at the start of the game, and can increase it via buildings and influence. [*]The Chosen assassins are not as ridiculous as it may seem. They try to capture your soldiers alive. Rather than teleport and 1-shot everything, they usually try to cause bleedouts, or stuns, and to snatch the still living soldiers away for questioning. This is arguably worse than killing a soldier, because it progresses alien victory A LOT. [*]A few new enemies, new mission types, scripted missions, maps, new cinematics etc.[/list] Oh, and be sure to play with mods. The modding community has done an exceptional job as far as QoL and enemy AI improvements.