Oh now i get it. Great then ^_^Well slight homing means 100% homing on the target locked when shooting.
Just that the ball turn rate is not so high. So they cant turn fast enough to folow the target. and hit the wall in the back instead ^^
I wouldnt worry. Its still fire and forget, just that it turns with the speed of a frieza disc ^^Spirit Bomb should not be homing for that is like us trying to Control the Sun. Once he launches it, he has no power to stop it or send it in another direction. Krillin and Gohan controlled it by bouncing it off of Gohan himself.
Now Yamcha's Spirit Ball is Controllable. Though not related.
That certainly adds an intimidation factor. 1.2.3 made ball attacks easy to overcome and send back with beams. It makes sense to give balls an automatic extra push since they don't have a constant force behind them like beams do.Its an attack that isnt bound to YOUR PL but rather the servers PL. It costs exactly 0 KI to charge and deals a ****load of damage.
Add the slight homing ability from 1.3 and you have a monster.
Even so with the new PS system ball attacks are really hard to struggle against. Especially balls with the power of a spiritbomb will allmost certanly winn a PS unless the guy struggling it is a lot stronger.