Clearly you've never lost five guys taking a landed large scout.
More seriously, an initial squad of four is hands down the most concerning thing I've seen about the game so far. Forget one big base or consolitis, this is the new fear. A squad of four has no strategic depth - even one casualty is a 25% reduction in combat capacity at a minimum. And what is X-Com without casualties? I don't understand, because the devs even went out of their way to talk about how important casualties were to the X-Com feel. Heck, one of the devs even lost four guys right in his first mission!
If it's a four man squad for the tutorial or something with the first research project being bumping the skyranger to carry 10 guys and a tank/14 guys, that's one thing. But that seems rather unlikely.