Otherwise, I was also thinking that
if the defensive gain caused by inside defense specialization with high SB in 3-2 and 1-3-1 zones is much greater than the offensive drop,
then SB could be gently adjusted depending on the type of zone defense — for example, slightly reducing the chance of a block when using a 3-2 or 1-3-1 zone.
I have a new idea.
(I'm not sure whether it has already been implemented or not.)
The concept of "open shot" could be divided into different levels, and both defense and shot blocking could have varying effects depending on the level of openness.
In theory, zone defense tends to result in larger open shots more often than man-to-man defense, but it also tends to have more help defense.
Shot blocking would have less impact on wide-open shots compared to less open ones, which can also be seen as another way to counter shot blocking.
This might make zone defense more realistic and may offer a chance to achieve better balance between man-to-man and zone defense.