Something my friends and I have noticed while playing in Aetherlight is our characters... aren't in the same position or placement on each other's screens. e.g., we'll be running together, and on my screen I will be in front of my friend, but on my friend's screen I will be running behind her. This scenario makes it complicated to follow someone, or even "point" to something with your character by standing next to it.
To be honest, this is my first 3D online-game that involves this type of gameplay, so I don't know if this is common among games like this, or if it is easy to fix or not. shrugs