Well she'll be doing it through her mouth, so ...

Why is the flesh eating chemicals?

People can surname as forename as much as they like. The weirdness is that you just know he did it with an eye on improving his standing within the party for a future leadership bid.

The TV version ends dropping hints that The Book of Dust might be on the cards for an adaptation, but to be honest I don't think that's going to happen. HDM was hugely important, but also it's time has passed and TBoD hasn't had the same impact (and is a bit ick so far). Best leave it there.

It also doesn't set its ending up very well - probably understandably given that it's three novels written over several years. That travel between universes is killing dust is thrown in right at the end, meaning it feels arbitrary, just there to force the ending it wants.

It's established that people can become angels, and angels exist across all worlds and can love other angels. Solution one, ignored. The dead all go to the same place and rejoin the universe from thee: solution two, ignored.

The story has - perfectly reasonably - things it doesn't want to happen and ignores its own world building to make them. It wants Will and Lyra to be tragically separated across worlds, and so moves things out of the way so they will be.

But it ducks that at every turn. "We should follow Him to get to Heaven" becomes "Nah, that's a lie"; "But He created us!" is "Nope: that guys been deposed". The story pushes the side of Azrael by making religion a lie even though God exists, which isn't playing fair.

Now it's clear that the book seriously strawmanned Christianity: in our world, the argument is whether God exists, but in the book He definitely does so it should be a deeper, more interesting question - if you know for a fact there is a God, should you follow Him?

But I think mostly it's that time has moved on since the book was made, but the adaptation (as most adaptations will) wants to remain true to the original story. The conversation between faith and atheism is more complicated now, and HDM didn't have to engage with any of that when it was written.