It's been noted that Newey has been spending time at the grid examining the McLaren car more than other cars and I found this to be a little telling in what might be in store for RB15s evolution.
It's been on my mind for a year or two and it has to do with the gharial snout nose that Mercedes and now McLaren employ. In particular, the narrowness of the nose is the first anatomical or physiological trait that stands out most and what benefit it brings.
Its design allows for low surface resistance and maximizes air that reaches the bargeboards, making them more effective. Increasing the downforce at the center of chassis and getting more over the diffuser and introducing winglets are likely the next phase.
https://as.com/motor/2019/05/13/formula ... 15842.html