I think this is a good place to say I don't like social links.
That doesn't stop me from being excited for Persona 5, but I wish they would just go away.
I wish they were less binary. What I'd love to see is for them to completely excise the whole "You might become closer with them soon..." kinds of conversations (where the S. link doesn't advance) but to compensate for that, make it EASIER to invert the Link or even break it off entirely. If you treat someone like shit consistently, they should stop wanting to hang out with you. The stuff you can say to people in Persona 3 and 4 and STILL want them to hang out with you is STAGGERING.
Persona 3 was a lot better than 4 in that regard. I really liked Yukari's social link because there were parts where if you tried to play it cool and do the things that would most convey your affection, she'd tell you to go to hell and the link would be reversed. If Persona 5 could incorporate an element where you have to be mindful of everyone's personality and make the mechanic more than just "pick the most agreeable choice," it would be really neat.