This is it, most of the Strawhats have 1 big fight and 1 power up or new attack left.
What buffs do you expect for the Strawhats, realistic stuff only, even Luffy only got 2 asspulls in the same fight.
Luffy - G6, new attacks and CoC related abilities. Multiple fights left.
Zoro - CoC and CoO related abilities, black blades. Multiple fights left.
Nami - Oda doesn't care, probably no fights or power ups
Usopp - armament and observation related abilities, new sniper moves. 1 fight
Candy - Science related abilities, RS, CoO related abilities. Maybe has more than 1 fight left.
Chopper - awakening, all of his forms fused into one faster and stronger point. Maybe he gets 1 fight.
Robin - awakening and a new attack, no haki for her. 1 fight.
Franky - new Shogun and new attacks. 1 fight.
Brook - awakening revives him and 1 new attack. Maybe 1 fight.
Jinbei - new attack. 1 fight.