1. It's not about using the signings we just made this summer, I would've thought Conte would replace Perisic (who played two games in a row in relatively short time) with Sessegnon (not a new signing), Spence/Doherty for Royal, maybe replace a midfielder with Sarr (assuming Skipp isn't really ready to feature). Otherwise, what's your theory for Conte only using one sub? Again, none of the players I mentioned count as new signings, can maybe only make that argument for Sarr about not knowing the system. He's used at least a few subs in every other game when we were arguably performing better.
2. I will repeat: not beating the first man is pretty bad... and I did mention that Son isn't exactly bad at taking corners, but the tone of your reply comes off more as defensive rather than addressing the issue. Do I need to mention again how much I love Son?