I agree with you, it's just the role from manhwa doesn't seem to be fit for jisoo, even though i like her, let's just be honest here, i prefer the role for jihye for more younger ones, maybe just like what you suggested kim yoojung or even better if they try kim sejeong since she's got an experience for action type
i use the term "actor" to refer to both men and women. and she is an awful actress. the only reason why she was cast in this role is because the blackpink fanbase will watch anything that she's in, which will generate a lot of profit. they see absolutely no potential in her as an actress, just her fame.
Sorry but Jisoo as Lee Jihye doesn't feel right, regarding on Jihye's personality it's incompatible.