Meregalli, Rossi and Vinales have all said multiple times that they have analyzed Zarco’s data, but could not do much with it as he has an entirely different style and is smaller and lighter than both the factory riders.
Which (IMO) is an aspect so often over-looked by the watchers and an aspect I believe that Rossi himself learnt over recent years due to the 'competitors' having raised the bar and thus, where in years back he could make the difference, now he needs all to work to be competitive.
No slight on him at all as all riders will use electronics in a way that suits their styles which afterall is how they should be used .............. to gain an edge for that rider