Actually, I disagree with you in the fact that Chibnall hasn't given us anything. Even though I'm sure that in his head he'd like Gwen and Jack, he has given us good Jack/Ianto stuff from the beginning. As much as most of fandom hates it, Cyberwoman was his. He gave us the kiss in End of Days. He wrote the Office/Date scene and the "I came back for you... all of you." in Kiss Kiss, Bang Bang. He gave us THAT scene in Adrift, along with the "I'll talk to him." part. He wrote Fragments and came out and said he meant Ianto's segment to be a type of 'romantic comedy. With a pterodactyl.'

So I mean, even if he doesn't like Jack/Ianto, he's sure sticking to their relationship much better then other writers *coughs and points to Meat*