First off, sorry.. I reread my post and I sounded like a dick.
But if you are going to assign grades, with mlb guys especially, you need to factor in the highs and lows. It’s movement, velocity, deception, overall ability to execute. I would say Shane Bieber has a 60+fb and reylo is 55, despite throwing harder. Gio has a 45/50fb and is a fringe starter/swingman. If I was giving him a fresh look and didn’t know his pedigree I wouldn’t give him a second thought
Every pitcher looks elite when everything is working.