Review Detail of Jr_DemonGod in Vice Captain of the Straw Hat Pirates

i like it thus far but What i find ridiculous is how he is able to learn techniques so fast; yes, the author mentioned that he used to imitate their techniques in his previous life, but i highly doubt anyone would put a lot of their time and effort to master a fictional technique from an anime, not to mention that the training for said techniques was barely shown (i think), and the muscle memory he had is gone since his body changed, yet he learned them in less than a month? And all of this is assuming he had a deep foundation of martial arts (knowing how to breathe while fighting, experience whit leg and sword related martial arts, etc.)in his previous life (that, based on a couple of comments throughout the book he doesn't seem to). If he didn't, then whatever "imitation" of techniques he did in his previous life was nothing more than chobyuou syndrome, meaning useless, and he learned techniques that will later evolve into one of the strongest techniques (i know he only mastered a couple of moves but it's still too much) of one piece in a ridiculously short amount of time. i hope that when liam back story is revealed or when his super regenerating powers origins are revealed this will be addressed sooner rather than later.