Let me wade into the Gervinho debate here. I've watched him since his Le Mans days, back when Le Mans was one of the most entertaining Ligue teams(at the time they had Sessegnon, Le Tallec and Romaric) all of them were promising young players playing a very quick counterattacking brand of football. Gervinho was amazing back then, him and Sessegnon struck an amazing partnership. He moved to Lille and he won the Ligue there in a team that had Hazard, Cabeye, Bodmer, Abdel Kader Keita and co, and he was also one of the best players in Ligue. He used to rip teams to shreds, naturally I was quite happy with his move to Arsenal at a time when we barely spent any money, I thought he would be a hit for us. He was terrible to be honest, he had terrible end product, I was very happy to see him go.
That being said, even when he had poor end product he was still an amazing dribbler, and always created chances for himself, so I wasn't completely surprised that it worked out for Roma. It became a psychological thing after a while at Arsenal, he started missing sitters I've never seen him miss anywhere else, and that happens sometimes, it has nothing to do with the quality of the EPL or whether or not it was a difficult league IMO. As Ocelot said, at the time Gervinho was here, we were a poor man's Barcelona, attempting to play a possession based style that we were not good enough for, and that harmed him, because he rarely had the space he craved to operate in. I'm willing to bet if he played for an EPL team that suited his style, he'd do just as well if not better than his level at Roma. People buy too much into players failing at a certain league IMO, most of the time conclusions are made that fit people's agenda.