Huh! Well I'm not sure whether it's as a result of patch 2 or just a coincidence, but I did just get an act 3 romance scene with Wyll that I'd not seen previously. (It's a scene by an oak.)
Did you get any [Tiefling] lines about this when talking to him? I very deliberately made a dragonborn for his romance because I wanted to see if there would be a special option when discussing his transformation. And there was!
Ooh, I wish I could remember. I have half a thought that there might have been something about knowing what it was liked to be shunned, but I'm not even slightly sure.
I'm not sure he'll actually agree at that point (I picked the same option you did). Someone should test this. For science.
I did wonder. I have been creating a save before each long rest so checking this (and whether there are tiefling act 1 lines) is feasible. Perhaps I'll have a rummage and see if I can find the right saves at some point.