By this point, Leonel's Life Force affinity had reached an unprecedented level, at least in comparison to his former self. This allowed him to see through things he hadn't been able to in the past, and he had even come to understand just where Aina's "instincts" came from.
Life Force was the core of it all, the root from which the connection to all things was formed.
Leonel wasn't the kind of person who liked to rely on instincts. He wanted to truly understand something before he could apply it. This was the way he liked to work and it was also part of the reason that he was so powerful now.
While one might say that he could be more powerful if he simply entirely relied on his talent, was this really the case?