It would help out the alliance greatly. Imagine if Law teleported Luffy below to allow him to fully recuperate and while there, he knocks out most of the Beast Pirate forces. All that they'd have to worry about is the Calamities, Flying Six, the Numbers and some Headliners (maybe some Gifters too but plenty of the other members would be out). Didn't Luffy knock out all of those fishmen without any of the citizens and Shirahoshi getting affected? Didn't Rayleigh tell Luffy that he shouldn't use it as recklessly and that he'd have to train to control it to only affect enemies?