He'll become stronger period, be it one way or another. That's what a power-up means, becoming stronger. Zoro said he will become much stronger. Zoro will power up. And you're still trying to argue about it because you can't accept it
A character will become stronger in a manga where characters become stronger? No shit.
You are the one who claims Enma to be a power-up, I claim the opposite. I have already proven that Enma is not a power-up.
The moment he took Enma he wasnt any stronger than he was before. That means it isnt a power-up. He can get stronger by Haki training regardless of Enma, that's what he did during 2 years time skip if you didnt realize.
The moment Sanji got RS and Luffy achieved flow destruction they were capable of something they werent before. Unlike the Enma.