His nature of raging momentum was the same as his tail or any of his toes or limbs.
This view made him focus on the subtle force around him. He can't get more control over it but rather his control over life force application to it.
Just like limbs that have limited positions, one can bend them, but how well one can utilize them was the case.
Donono's remark might appear simple but was profound or maybe it was something that only a genius mind like him can grasp with ease. Or perhaps he heard someone he respected say something similar.
People like Donono won't take any word seriously.
The point was Eugene was already seeing a path to better utilise the aspecto he had obtained.
But before that, he needed to survive this hail that was coming down on him.
The subtle force was like hard glass around him. It subtly interacts with wind or anything physical but rejects projectiles as well as anything harmful to him.