It all comes down to a matter of taste and preference. In my opinion and looking at the bigger picture, Lee Dong…
I don't dislike it and it does make it more entertaining it just didn't look natural to me compared to the rest of the cast (except with Yong Ji who is kind of similar)
The best ending would be: MJ stays with GH. Yuri, alive, becomes SW's mom. GH & Yuri live like a divorced couple ( joint parental responsibility or whatever). MJ & Yuri stay close friends.
Some of y'all have questionable taste for being #TeamBaekKyung or whatever. Like yes we do love us some tsundere characters but in this case, he was just literal trash until the last two episodes... Good acting from Lee Jae Wook though.
MJ stays with GH.
Yuri, alive, becomes SW's mom.
GH & Yuri live like a divorced couple ( joint parental responsibility or whatever).
MJ & Yuri stay close friends.