Im surprised there is so much negativity regarding the underwater element of Arma 3. The idea of small groups of divers doing recon missions before the main forces invade, future mods with assaults on tankers out at sea, oil rigs etc and then there's the possibility of inserting into a port and blowing the enemy boats out of the water without even being noticed. With combat on land and in the air it was only time before BIS looked to the sea.