True, but with full intel Katsuyu's/one big ass Katsuyu will be summoned in the beginning of the fight.
Also Tsunade and Sakura would start bombing the ground with their punches, those punches that actually killed shitloads of juubi clones.
Gai is clearly the biggest threat here with his gates, but Tsunade takes him.
Katsuyu is not much offense type of summon, Acid is easily dodged or tanked/flinked away by rotation or airpalms. Guys need to take down girls here; not the slug.
Gai can endure a self-sacrifical Technique like gates (remember the situation happened to Lee after his battle with Gaara) punching the ground would not even make him flinch.
Kimimaro can tank a direct lotus attack from Lee to his chest, he can survive being crushed by tons of sand an indirect attack like punch to ground is again doing nothing much.
Besides punching battlefield is not a Good strategy when one has teammates around, Sakura and Tsunade would hinder each other's and Shizune's movement if decimating ground is that effective.