To be fair, that is simply too soon to say, because until now he has not played against a real top class defense. Formations, which have the ability to put enourmous amounts of pressure on single players. There are for example several systems which are build to immediatly double dangerous players, the most obvious being high movement and pressing systems (e.g. Barcelona, Bayern, Dortmund). He has also yet to show that his ability to glide past opposition works against high calibre defenders, who have better anticipation, positioning and tackling abilities than the ones he faced so far.
Januzaj has immense potential and talent. That is plain to see for everyone with a little knowledge about this sport. It is also understandable and completely fine to get excited as a supporter about such a shining prospect. Some put the bar very high already, though. On the last pages he was compared to Cruyff, Best or Ronaldo and named him as a potential Ball d´or winner. Predictions like that come too early IMO.
It would probably be wise to wait at least until the end of the season. By then, we will know way more about him, because he will hopefully have gotten the chance to test his skills vs. the top competition in the EPL and perhaps even in the CL. He will also have had the opportunity to show consistence over a longer time span and how he handles things when not everything runs smoothly for him.
