Now that Statcast basically has metrics for everything scouts used to grade on, have you noticed some instances where the 2 just didn't align sensibly? Like for me, I would 'grade' players accordingly:
Hit tool - contact% + some measure of contact-quality (LD%, 90th% EV)
Game power - Average EV
Raw power - Max EV (Judge/Elly/Stanton are 80s and you go down from there)
Speed - I've noticed several players (I can't think of them off the top of my head right now) who graded as like 60 during their prospecting days and then have 98th% sprint speed, for example.
Glove - speed + route efficiency for OF, first step + catchability + footwork for IF.
Scouts have the tools to measure these in the lower levels, they just aren't fully collected and published like they are in AAA/MLB yet. I'm sure next year we will get them for AA and gradually each level will have these ready for public consumption.