"Changed GK? Not even close" Sorry, very close, maybe you haven't noticed the number of PL keepers and keepers down through the leagues that have been copying his style over the past 4/5 years.
"but if he wasn't with us, most would probably mock him for his shot-stopping abilities" that's just negative speculation, the alternative and equal possibility is if he played behind a poor defence elsewhere he might make numerous top class saves. We can criticise his perceived "shortcomings" but no need to exaggerate them.
"Ederson will never be close to Yashin,Neuer, Buffon, Maier, Banks, Zoff... both in quality and in how he changed GK" fair enough that's your opinion, but it is not a reasonable comparison, 1. because none of those keepers had some of the strengths Ederson has and 2. he is barely at the half way stage of his career so it is pointless to compare with any keepers whose careers are over or nearly over. Let's judge his place in football history when his career is history.