Someone on Reddit asked how we would change the ending.
I'm really happy with what we got, so I don't want to change anything.
But there's a dialogue i would add:
Noctis call's back Iris after you rest in a checkpoint, to ask her what she wanted to say. It won't be an overdramatic scene or tearjerker moment, just him saying he have a little time to spare and that he can't focus thinking on what she wanted to say.
The dialogue would be about Iris asking forgiveness for being inmature and interfering with him and Luna, saying she's sad for Luna and how everything has gone. Noctis would deminish her worries and then they would small talk about what Iris has done with her life and how Noctis missed her train, sharing some laughts.
Once the call is over, Noct asks Gladio "Does she know?", which Gladio would answer with a "Yes. She has grown really strong, I'm proud of her". And Noctis would finish with his classic "Yeah, me too."