Well, it's not like it's going to find any new spot, but I can see it narrow down the spot down. Also, I think because the shot need to overlap (both cannot reach+cannot see) it should narrow its use even more.
And either way, it just seem pretty useless. Users on Mouri level seem to have no trouble handling World of Ice (not too sure on this though). It seem to be mainly AK they have problem returning.
Really, I think Atobe just use that to see as many possible places he can hit the ball to as much as possible, to open his options up. I think it's hardly in doubles to use tech like AK or World of Ice since it's useless unless that both opponents have the same blind spot. Even if one can't return the ball, the other can simply do it. Atobe probably use it to see if there's anywhere that, say, AK Mouri and World if Ice Ochi, or something along that line.