Yes, Luffy and Zoro have equal portrayal and strength. Now, that doesn't mean that they're always equal 100% of the time. Sometimes Luffy is stronger while other times Zoro is stronger. But overall they are equal.
Oda told us they are equal during Zoro's encounter with Kuma.
Kuma allowed Zoro to exchange his head for Luffy's head.
There was one condition before he considered Zoro to be an equal exchange for Luffy. Zoro had to handle all of Luffy fatigue. He fought Zoro so he knows Zoro's strength and he now knows Zoro's ambitioun.
Yes, Oda is telling us that Zoro, the future WSS, is equal to Luffy, the future Pirate King.
There it is. So anybody who wants to claim Kid and Law are stronger than Zoro and have greater portrayal than him is wrong. No, it hasn't changed since the time skip.