Going back 60 years, a pitcher should have more K's than BB's. Maybe double.Has always been that way. If a pitcher has more BB's, it means he is wild. Used to be called "a free pass", for good reason.
On K's for hitter and pitchers, if a K is good for a pitcher, it has to be bad for a hitter. It can't be split. If a hitting stat ignore K's, then it is not a finsihed stat, or it is broken.
Re Espinosa: I'll accept his K's if he hits 30 or 40 homers, but he tops out at about 20 homers. My guess: he's swinging for homers, and he's not a power hitter. Lock was acceptable with Espinosa-style hitting because he hit 25 homers, and played a fine CF. When lock dropped to about 15 homers but kept striking out, it was time to give up.