I am all for Dr. Ye.
Minho didn't actually mature that much. I don't see him giving thought into his job and the only reason he is finally nice and considerate towards Bo Young is because he suddenly happen to fall in love with her.
Whereas Dr. Ye was nice and considerate from the beginning and he treated everybody equally as long as he could see them being earnest.
Also, Bo Young really loves poetry and Dr. Ye really appreciates that. I really do see their connection because they really are passionate about the same things and they're always smiling and appreciate the small things and thoughts. It's totally normal to try to look your best in front of the person you like and I don't see her trying hard and only being herself in front of Minho. Just because she acts feisty doesn't mean that's her real character, she only acts like that because he was an ass most of the time and even refused to be friends in the beginning. It's like he basically asked for her to treat him like that.
I really don't think Minho deserves her just because he realized what he missed.
I am going to be so mad if she ends up with him. I just want to watch a drama where the people fall for each other because they've been nice from the beginning.