Using 0.2 density for the Hoplite units is the best solution in my opinion. It let the Hoplites stay closer together like a real Phalanx. While at the same time not having the extreme closeness and pike angle with short_pike. And not having these 'blocks' with shieldwall or guard mode, but instead it will be a fluctuating thing, like a Hoplite Phalanx in my view was. Though only little pushing power is missing.