An underwater map would be really cool

[exotic palm]

(lower gravity, muffled sound, slowed movement speed etc.)

(Beacons are located on small islands above sea level)

( Underwater Flying robots are unable to fly)

(Hovering robots and titans constantly hover above the water level.)

(Under water Rockets move slower, but deal more damage due to cavation bubbles.)

( Underwater Energy weapons deal 10% less damage.)

(EMP lasts twice as long underwater.)
(Flames don't work at all)

( Underwater Energy weapons that fire electric arcs have doubled range)

[uncut bobcat]

That would be a cool gimmick map, though Pix would most likely restrict it to skirmish only (to avoid players rage quitting).