Travis

Why not? Because it would ruin the need for teamwork and require a lot of development effort that is needed elsewhere. The writer wants them to rewrite the core of their game simple because they think it would be "cool"...

There's no benefit to larger squad sizes, and it literally goes against the writer's desire to make the game harder. One more player is a huge increase in firepower alone and would unbalance the entire game. Not to mention there are a A LOT of other things the developers med to focus on, and the amount of work this would require would detract from the rest of the game's development and the ongoing campaign.

You don't actually have to damage pyramid head in the apartment fight, just survive till the siren. Causing damage seems to lessen the time until the siren, but it's not necessary, even on hard.