Regarding the bullpens. Have you considered having several of the same pitch (e.g., grip, location) thrown sequentially? This gives an idea of how repeatable the pitcher is. And allows for adjustment, if required, after a couple of similar misses.
E.g.,
3 ea. 2 seam, low & inside, w/u
3 ea. 2 seam, low & inside, stretch
3 ea. c/u, low & away, w/u
3 ea. c/u, low & away, stretch
3 ea. fb, low & away, w/u
3 ea. fb, low & away, stretch
3 ea. curve, low & away, w/u
3 ea. curve, low & away, stretch
3 ea. 4 seam, up & in, w/u
3 ea. 4 seam, up & in, stretch
3 ea. c/u, low & away to a lefty, w/u
3 ea. c/u, low & away to a lefty, stretch
etc.
This routine will give the pitcher an idea of how his command is progressing. And if he misses several times, he has several throws left to adjust.
Alternating fb's with offspeed can help him develop habits that will avoid telegraphing his offspeed (e.g., throwing the c/u identical to his fb).
JMHO