Came here to post this. I was guilty of overrating the verse too when it first dropped. I guess it was because Nicki was viewed as kind of a gimmick artist (which she really is/was) but kinda sounded better than expected next to Hov, people overhyped the shyt out of that verse.
Also Exhibit C as a whole feels overrated. Some people were acting like it was greatest shyt ever when it really wasn't THAT amazing, just good.
In a way Eminem's Forever verse, just because it was the first Em verse after Relapse where he didn't use those weird accents and just because he outrapped Kanye, Wayne & Drake and/or their ghostwriters it doesn't mean it's an all-time great verse.