Love the idea. Wonder what the server to client traffic would amount to if it was automatic. And how much they would have to ping the updates. Aslong as it was party only i'd expect it wouldn't be that much. But Devs seem get antsy about bandwidth. Partially because people bitch about it so much. (some times with good reason)

Course if the updates are too far apart it will get abused to death. Form up, get bonus, scatter, run back to keep bonus etc.

All that aside. Would love it. And it would give some real incentive to mid range classes. Theres so much Melee and Full ranged that the Mid or pole range from alot of classic games including tabletop has been lost because it really doesn't matter. For instance despite the Lancer's slight bonus to range over other melee classes it doesn't "keep" anything away from you due to the threat of the pointy end, cause numbers know no fear!

But if you add formation like you have above. and perhaps add even 3 deep formations such as:

X X X 0

There the 3rd X out really has to be at midrange to be in range to hit it could serve as an added bonus to design by the devs, and bring by the players more midrange style classes/jobs. Could definately add a new dimension that we haven't seen in alot of games in a long time.