Blocking shots vs. forcing misses
In terms of measuring a player's defensive performance, should these
two have the same value or should one be bigger than the other?
I'm not a mathematician, so this is simply coming off the top of my head, but I would think that a block would be more valuable than forcing a miss. From casual observation, a block more often leads to possession for the defense, or even to a fastbreak. Even if the numbers dispel this (I'm not sure if they do or don't), a missed shot can reset the shot clock, while a block doesn't. That alone would make a block more valuable in my mind.