Awesome update, Shre! 👏 You have given us a glimpse into how the battle might have gone, had the Pandavas known about Karna beforehand. I honestly do not believe they'd have fought anymore if they'd known, as they'd respect Karna too much as their elder brother to fight him, and thus Krishna told Kunti to keep the secret until after the war. But it's an interesting scenario to think about nonetheless.
I've been thinking about this the other day, when someone asked what was the difference between the Pandavas and Kauravas in the war, as they were all following dharma, and thus why did the Kauravas deserve to die and not the Pandavas, and the answer is so clear. The Kauravas all followed their own personal Dharma, which they felt was greater than Dharma as a whole. They did not realize that the definition of Dharma changes as per circumstance, and thus their decisions must too. Karna felt his Dharma was in supporting Duryodhan simply because Duryodhan supported him when he was alone, and that feeling of debt made him think Dharma was with Duryodhan. Bhishma felt his dharma was in adhering to his vow, no matter the circumstance, and Dronacharya (like Karna) though his dharma was supporting Dhritarashtra's family for giving him shelter. But more important than all this was Dharma towards God, towards the world, towards society, and these three characters failed in that. They stuck to their personal dharmas so strongly that they forgot the bigger and greater dharma they had towards the world, which everyone has, and thus they all had to give up their lives for supporting the wrong side.
Sorry for my rant 😆, but I loved your update and it made me think of this. The relationship between Karna and his three wives was really well portrayed. 👏 Many Karna supporters claim that he was a monogamist, but I don't believe that. Many versions have Karna with multiple wives, as it was common back then, and had five sons among the three of them.