I think the problem with the art is the fact that the artist had to redraw the beginning in the last months for some reason? I'm not really sure. But i know for sure that Park Jin-hwan (the artist for "The breaker") nailed the art in his last 2 works, the art in "Trinity Wonder" and "Promised orchid" look so good and have a lot of details in them the coloring was really good, there were times while reading when i was just sitting there and admiring the view, some characters look a lot like the ones in "The breaker" like Gang Wu-Jin reminds me a lot of Han Chun-Woo in looks and in character. Or the MC in "Promised Orchid" Yang Jae Sin look a lot like Lee Shi-Wun.

So ye "The breaker: Eternal force" looks bad probably because it was rushed...