His flow was an adaptation to the era...you can't bring a '91 flow into '98. The lyrics cover what I said already.Even then, I disagree... the "Don mega" era Ice Cube was still a significant drop from his original form. His flow was more stilted and don't get me started on how corny the lyrics became.
But I also don't see Cube as an elite lyricist from the jump. He was a good lyricist with other elite traits (delivery, content, storytelling, album cohesion).