I was trying to avoid politics, dammit.
I personally don't think Imperfect Cell is too much stronger than SSJ Vegeta. Yes, Vegeta said Cell's ki was huge, but Cell was concerned about fighting him and let's be honest, Vegeta thinks of his own ki as huge. He could beat one of the Super Saiyans, but two (Trunks doesn't count, he's way too weak to be useful here) is too much even if Goku is weaker.