First off nothing about Trans-AM was ever in Veda that data was transmitted from elsewhere when Aeolia Schenberg was killed and only to those with original solar furnaces.

Second nobody is arguing Billy didn't magically come up with Trans-AM. We are just stating that particular plot twist is complete BS and it frankly shouldn't have happened. It wasn't even foreshadowed in season one in any way it was just kinda thrown out there last episode.

Finally its not like Billy has been working on this Theory for the last few years and finally came up with a breakthrough. Its something he took on after this season began when after his drunken plaything left him.

Its about the same way I felt about them bringing back Mu La Flaga in Gundam Seed Destiny after he was blatantly killed in Gundam Seed. I find the blatant retcon so they can put in a bad plot twist to just be a terrible addition to the show.

I would feel a lot differently if the Eifman was never brought up in the first place or if it was some new technology but no its Graham gets a power that has no right on working on a non-original Solar furnace suit.