While I think Luffy would still loose to the other Yonko, Wano proved he is at least strong enough to individually hang with them and split the sky. But Luffy is still lacking as a Yonko in the area of Military might. SH needed the help of the Wano Samurai and Kidd/Law Pirates to beat Kaidou’s army and couldn’t do it on their own.
Now in egghead we see Saturn is rolling up with a massive military and SH don’t have any allies helping them besides Vegapunk. I think this is the moment where the Grand Fleet will become necessary and have a chance to prove they are a Yonko level military force underneath Luffy by dealing with Saturn’s Fleet while the SH focus’s on Kizaru, Saturn, Seraphim, and BBP.
Now in egghead we see Saturn is rolling up with a massive military and SH don’t have any allies helping them besides Vegapunk. I think this is the moment where the Grand Fleet will become necessary and have a chance to prove they are a Yonko level military force underneath Luffy by dealing with Saturn’s Fleet while the SH focus’s on Kizaru, Saturn, Seraphim, and BBP.