How would this change the events of Namek now that Goku survives with far milder injuries and Vegeta is extra angry? Since Goku would likely get the Saichorou potential unlock, how strong does he get in comparison to his gravity trained self?
Tbh, I don't think Vegeta would be anymore angry, the fact Goku pushed him into turning Oozaru in the first place was really insulting to his pride, and he knew the Genkidama at the end of the day was a technique Goku used that ultimately defeated him and brought him to near death.
As for Goku's Potential Unlock, I think he would have got a bigger gain from it than the gravity training. Goku more than likely also got a big Zenkai from his fight with Vegeta so I think he was at least solidly above 10k before entering the gravity chamber, likely around 13-15k, so he only got like six times stronger.
If Kuririn, who isn't even a Saiyan can go from, like around 1.5k to over 10k to maxing out to likely 75k+ then Goku would likely get around to the millions mark.