Kaguya >>>>>>> Momo
RSM Naruto and Rinnegan Sasuke devastated Momo with their combined Susanoo and Bolt was there to deal the final Odama Rasengan.
No one in the NV rivals Kaguya's power and this is an established mangafact.
His powers are he can use attacks to bring forward or repel things but Kaguya shits on him any day with her Sukyomatsu and her RinneSharingan.
Even Toneri can beat Momo with his Tenseigan Chakra Mode so I don't think this new villain is as OP as he looks.
Does Momoshiki have all the Biju within him? Is Naruto trying to free the Biju from Momoshiki? Nope and nope
You just made that reason up, Naruto used the bijuu chakra because he needed their power during the fight.