To my understanding & base off the description of the badge PnR Maestro doesn't increase the shot percentage of the pass receiver. It boost pass accuracy and shot percentage for the ball handler only. Also pick & roller doesn't increase shot percentage for the ball handler.
2k14 was the last time they disclosed boost value form badges, they were called signature skills back then. The values most likely aren't the same but we they shouldn't be much different.
http://www.operationsports.com/featu...-skills-guide/
I haven't use them yet but I plan on using them with flow freelance.