This is a weirdly hostile reply, but I'll bite.
In Persona 3 and 4, there was Junpei and Yosuke who filled similar roles. Your first friend, the Magician social link, the other transfer student who went through what you went through, etc. They even had the same jealousy issues. Junpei is one of my favourite characters in P3, while Yosuke couldn't be more annoying to me.
The problem I had with Yosuke was his immediate attachment to you. He was everywhere, and it became more and more evident that he had no other friends. It was a weird burden to put on me. Him constantly calling you and being all partner-partner had me just like "slow down bro." Sure he's friendly with Chie and Yukiko, but he has no real friends. Then you do his social link and you realize he has literally nothing else besides you. He even stands alone in a corner all day unless you either take him to the TV or do his social link. (I get that mechanically this makes sense because you can always have access to your full party for the dungeons, but in terms of story, it just comes across as sad) To top it all off, at the end of his link, he apologizes for thinking you were uncool and wants you to punch him in the face. Sorry, I just found it all to be a little too much.
Meanwhile you have Junpei, a character who is sort of your first friend too, but he's not a socially inept loner. He knows other kids, he has other interests, he has his own life. When you become friends with him, he doesn't become obsessed with you. You become one of his friends, not his one friend. It felt more organic in a higschool setting. Some nights he'll go out with his friends instead of going to Tartarus. He feels more like a real person. He has his own storyline with Chidori and you can see real growth that happens without you when his persona evolves. I liked that the onus of his personal growth isn't on the protagonist. Whereas with Yosuke, if you don't spend hours and hours with him personally, he doesn't realize shit.
So yeah, that's the issue I have with Persona 4's way of handing party interactions compared to Persona 3. I could go more indepth comparing all the characters, but I think that would be too much for this thread.