I get what you say. It's watchable. But I can only watch it by forgetting it's an adaptation, because the webtoon is just too good and I remember it all
I disagree with one thing : the webtoon WAS deep. The K-Drama isn't. It's not freedom, it's lazyness. If you pay attention, every event of the webtoon is in the kdrama, but simplified (several event are combined, even). I won't talk about characters, or their development
It's a good kdrama if you want to pass time. The fights are good (which is frustating because you can see the potential for more, like, the crafty side of Grey). But it's a trashy adaptation. I will watch it to the end to have a final idea but the fact I intentionaly forget the webtoon to continue watching it isn't a good point
Tbh, the drama itself wasn't all that bad. Yes, it didn't do the webtoon justice; well they choose to end it with the last arc in the webtoon, cramming that build-up 150+ chs into 8 eps of 40-ish mins resulting the...unique plot. But I see they somehow tried to keep the essence like, how Baekji Na actually wishes true friends or something? I kinda forget the detail but I remember reading a panel where he imagined being friends with Sieun? Or is that only my imagination? XD loll
Anyway if it was like that, then it matches the drama; yes it's different (duh, when I watched that scene, I was like 'oh? Hoo... childhood friend. These two? Hoo. Umm. Okay. Interesting..hmm #frowning—) but the essence is there, needing someone he could call a friend.
Honestly, whc2 is challenging in itself coz it was the actual Weak Hero time set. Whc1 turned out good because, in the webtoon, it wasn't that deep, which gave the director or whoever wrote the plot for the K-drama a lot of freedom to explore, expand, to build; while in whc2, we, webtoon readers, are more deeply connected to the characters, the plots—knowing what will happen, etc thus we make somewhat expectation toward the drama inadvertently—or at least, that's how I perceive it.
Dammit, I dunno if it makes sense; Eng is not my main language ( ≧ᗜ≦)