I dunno Jonn, I think you're maybe setting the bar a bit too high. Not every player needs to be Kershaw or Trout. Those are A++ players.
I'd grade the majority of the players 1/2 a letter grade higher than you did, and several of them (Lind, Dickey and Reyes especially, though I see you sort of awkwardly lumped him with Kawasaki) a full grade higher.