I'd certainly use the PHB entry and the expansions in other products as the basis for the more diverse Tieflings in 5e, I've given a little thought to how one might handle variant abilities. Of course the appearance and origins of the characters are up to the player's personal choice.
It's very useful to hear from Zeb Cook and McComb about Tielfings, but I think Monte Cook's opinions also matters a lot on the subject.
It's very useful to hear from Zeb Cook and McComb about Tielfings, but I think Monte Cook's opinions also matters a lot on the subject.