Every Luffy's CoC scene pretimeskip involved people surprised by it but Luffy being completely unaware of it, let alone caring. And it didn't take away any power from them.
Also, as you said that's how you read Zoro reaction, so that's pretty much it. I think it would be a nice scene not only for Zoro but for people witnessing it and its impact in how he's perceived throughout the world.
"CoC haki isn't special anymore" > Only fifteen confirmed users among almost a thousand named guys, consistently referred as something that catches other characters's attention, it was the core of Chinjao's speech about surpassing Roger.
I think you're quite biased here.