One of the things we teach on the team is to have the kite balanced on neutral... Not forward, not reverse... Right in the middle.
This way, either direction is just a slight nudge away and the kite is never trying to prioritize between forward and reverse.
Also, when teaching... Consider this:
1} Standard Rev tuning, forward pulled in... Flier launches, it goes up and eventually proceeds to fly way off and crash on the edge... Impossible place to launch from as a newbie, and less wind to work with.
2} More reverse (not overkill though)... Kite launches, hovers a bit, then is 75% more likely to crash in the center 50% of the window... More wind to relaunch... Neither forward or reverse giving the flier a feeling of holding onto a galloping horse (stuck in forward).
I'd rather spend the time teaching them how to relaunch (with wind in the center), instead of having to launch the kite for them off the edge... More time in the air for them.
Just my two cents... I've been highly successful with this method.