I wouldn't say that anyone has been obviously better than Nani over the last year, apart from both Messi and Ronaldo, of course. As you have rightly suggested, neither is an orthodox wide player, but a kind of new breed of player who, while having starting positions, influence their teams in a much more profound way than most.
Nani would probably need to be similarly influential next season to be classed as one of the best players in the world in his position, in my opinion, because there are so many examples of players who have a brilliant season or 18 months and then never quite reach those heights again. I certainly don't expect that to happen with Nani, to be honest, largely as a function of the club that he plays for and the demands that are expected of him. It's a question of semantics, I suppose, with regard to whether a player is, at this very moment, one of the best, or genuinely one of the best, which should require longevity.
As to who we should sign, unlike some I am convinced that another player in the wide attacking positions would be beneficial, but it's obviously not a priority. I have to admit that the options are somewhat limited, which is why I wouldn't be overly concerned by the signing of Young. Two players that definitely stand out as potentially among the best in the world are Hazard and Sanchez, but there can be any number of reasons why they wouldn't be available or even desired by the club.
Other options would be a player like Neymar, who, while not really a wide player, looks to have the potential to become similar to Messi and Ronaldo in his ability to influence the team from any starting position. And we also have our own players in Welbeck, Cleverly, and even Morrison, who are likely to have to play slightly out of position in their formative years because of the importance of having established players in the center of midfield and attack.
At this point, I would probably prefer that we wait and see if a player of genuine potential either emerges or becomes available in the near future, particularly as it isn't a current priority, and for the club to focus on other areas of the team. But having said that, that very focus might be the reason why we are possibly looking to sign a player like Young for a relatively good price, which would certainly be understandable if not mine own preferred choice.
