I agree. But I think a key factor is the object ball speed. As you said, you have to adjust to different conditions. Slow rolling is fine as long as the table is level.
I feel like the idea is getting lost within the concept of `slow`rolling.
Watching Efren play the ghost, and I`d say 99% of his shots are roll shots. And even the one percent that he has to ``punch``, I`d still say it`s debatable whether it`s a punch shot or not.
So you can roll-roll, roll-draw, roll-force follow etc.
I don`t think literally rolling the ball everywhere by hitting above center was the answer you were looking for when you posted this topic.