[snip]
Akatosh is a politcal creation by Alessia.
[/snip]
I'm gonna make a few leaps here, and correct your (and the very common understanding) "political creation" to "man-changed God". Alessia may have come up with the idea of Akatosh-as-Akatosh, but even Pelinel references "Aka", and the Nords were worshiping Dragon* since Atmora. Then there was that whole Marukhati Experience (dibs on the name for obscure indy band), wherein they forcibly did
something to Time (capital T, Big Daddy Dragon), temporarily breaking It in the process.
Which brings me to a point/question: If you change Time, when do those changes take effect? Did what happened during the Second Dawn influence events from the First one? We're talking about Time here, after all... if you change something about Time, wouldn't that make it Always So? Think more sideways than just the over-cynical and literal thought of "Akatosh doesn't matter, because Alessia made him".
Moving back to the OT: The dovah are, inferring from the few conversations we actually have with them, intricately bound to Time(/Akatosh). My main question is thus: Is Alduin the Firstborn of Akatosh the same way Auriel is the Firstborn of Auri-El is the Firstborn of Anu the Everything, or how Lorkhan is the Firstborn of Sithis is the Firstborn of Padomay? A fractal division of Big Daddy Dragon, whom, as the game (or at least Parthy-on-the-Mountain-Top) explicitly states somehow "shirked" his rightful role? Which ties into my previous point, at least a little bit. Akatosh IS real. Whether or not Alessia is to credit doesn't matter; He is Time, which means, from a linear perspective, he has always been Time. Lorkhan's children eventually found a trick, making it so that his "other half" (/enemy/antithesis) was sympathetic, had
always been sympathetic, to Man.
*Side-note: I thought it was really interesting to hear how the Nords from the Dragon Wars reference a "Sister Hawk", which I thought was a clear reference to Kyne(areth). Anybody else get lore-jollies from that?