No not at all. You can like more then one player (and unlike Rossi, he is unrealistic, I was recommending Berba when we were about to buy Amauri, and he was still in Spurs, but was too pricey).
But this slick mofo is a real treat. With Berba in Tottenham, it was bit nostalgic, as in me watching an EPL team nearly weekly solely due to the magical shit of one player alone, like I used to with Cantona In Man U, Le Tissier in Southampton, Ginola in Newscastle, and Zola in Chelsea (these teams were uninteresting without these figures, same with Spurs without Berba).
as Fred says, Berba doesnt suit Man U so well, and our attack would be great with someone like him creating for fun (above stats show he assists 10+ every season).