Actually I think you can take your version of how the elf/human babies work as canon (remember Feynriel in da2) he certainly didn't look fully human. The writers can say that's a mistake but it's in the game so it's canon for me. I don't like how they wrote this (frankly terrible) lore just because of Alistair, genetics are random, you can just say that Alistair looks very much like his father and not his mother (which happens in real life? like?) not base it all on his case.
Pretty much, my version is really just directly taken from old DA lore. Not to mention, Weekes has even corrected himself that elven features are possible. They would simply never be as “severe” as Feynriel’s ever again.
Plus Alistair has his mother’s nose, so...I just don’t see the purpose behind the new lore at all?
I’m just going to stick to my own lore.