Shower thoughts:
In FMA:B (and maybe FMA'03), when we meet an armored Barry the Chopper, do we think Lab 5 came up with the idea of putting a soul in a suit of armor all by themselves?
Or, perhaps, they took the idea from what Ed did to Al.
We learned at the end of the series that Bradly and the Dwarf both knew that Ed had committed human transmutation from the very beginning due to his clap alchemy and simply pretended ignorance because it was useful for their long term plans. It's not a stretch to think they knew what Al was as well. That maybe others high up in the military, those in on the country-wide-array, might be aware as well.
What if some General or other went to Lab 5 and said "this is what a 10 year old was able to accomplish. Figure out how he did it and replicate it."
That sort of research should have produced more people who have performed human transmutation, more people Father could use for the array rather than forcing Roy's hand. That it didn't is... weird, honestly. How the series determined what was and was not human transmutation never seemed consistent. Or I'm missing something.
I dunno, I just kinda love the idea that Ed's act of love to save his brother could have been the inspiration for such fucked up research.

















