I've had only one negative play experience in this game and that is the SM Orbital Strike, especially in 3v3's.
They are able to place the beacon on a piece of terrain that is unreachable by my units due to the ramp leading to it being behind a large army or they can put it behind 3 armies and its infinite range and rapid speed allow it to eat my entire force including a 9 elite point unit. It's also incredibly fast and can run down any 9 point unit. This thing either needs a vastly increased recharge time, a vastly decreased are of effect, a vastly decreased range, a vastly decreased speed at which it can move, or a redesign in some other way as a turtling space marine army will just wait for an attack and wipe out the entire attacking force with minimal losses before walking across the map uncontested.
I reiterate that it is the only thing that has caused me to actually have a negative play experience in this game as other powerful abilities can be countered if looking for them but there are so many ways that this thing can't be. Please change this ability.