Very few was better than Nani at his absolute best, and Queresma was arguably better still. Sterling is pretty awesome when he is at his best. Lennon was a handful for the elite fullbacks at his best. Key here is consistency. Throughout a season, you would want someone to perform to high levels throughout the majority of the season, not someone who gives you a 10/10 performance one day followed up by a 3/10 and then a 4/10, which Coutinho most likely will give you. The very best players are extremely consistent, whereas Coutinho is not. Currently, Eriksen is the better player even if Coutinho can be more flashy and arguably has a higher ceiling.