Gonna have to disagree there: even before the recent chapters, I knew they would struggle: First, no Franky means no repairs, second, none of them have Observational Haki, so they can't see if enemies are attacking in secret and third, Nami and Chopper's track record for defending the ship goes against them: remember in Skypeia where Chopper failed to defend Merry from serious damage and Nami couldn't defend Merry against Eneru, even with Usopp and Sanji present? I can understand why Chopper would stay, best to keep the medic in one place, but the others? No chance.
Awesome! But aren't all the good eggs in the one basket with the Factory Destruction Team? Not doubting the other's abilities, but if the Sunny gets attacked or the Ceasar Delivery Team gets attacked, won't they be a bit under equipped? Wouldn't the fact that Luffy is on that team it should require less people? And wouldn't Franky be better on the ship in case it does sustain damage and he can repair it?