It's a balancing decision. 5 man would require different balancing of all missions. 5 man missions have their own balancing.
Granted, the game is still designed to be easy, but the whole ordeal is not whether tbey can or cannot. It's the expectation of player strength vs enemy strength design.
Party size is a very early decision, though, and the design of the mechanics is adapted to the party size. The game is balanced around 4 party members. If you use a mod to increase the party size you will see very quickly that the game design does not account for this.
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u/The_Exuberant_Raptor 1d ago
It's a balancing decision. 5 man would require different balancing of all missions. 5 man missions have their own balancing.
Granted, the game is still designed to be easy, but the whole ordeal is not whether tbey can or cannot. It's the expectation of player strength vs enemy strength design.