Raylor has certainly made a massive improvement this season. Thought he was dogshit for the last few years but this year, he's proved that he is a player who can do a job on either flank (be it as a fullback or a winger). Such versatility is an asset.
His delivery, free-kick-taking ability and shooting (all down to his technique) are great attributes and have certainly contributed to us winning games/earning points this season. Having said that, he is quite limited in terms of his general play which is why he shouldn't be a starter.
As some people have said, he's a great squad player and can be a dangerous option off the bench.