They need a compromise. Pitcher safety would be no classic ms, classic plus only below c, 8-12' arc to a mat that is one inch wider than the plate, the plate is a strike, and bats are 265 compression.
That's not feasible for an overnight rule change, excluding 2020 when I told you that they could change everything due to COVID. We'd have played with nerf balls and wooden bats that fall just to get back out there.
A good compromise imo would be getting rid of classic ms entirely, emphasizing calling the corners more aggressively on the strike zone, moving the strike zone back to back shoulder instead of highest shoulder whatever that even means, dropping the excessive speed call and just calling those balls flat if you want to call it, raising gsl to 6-10, and look to raising all to 12 the following year.
Do ALL of this before phasing out 220s and I doubt you hear too much complaining. Definitely have to get rid of the classic m before that imo. Perception is reality for 90% of softball, and they'll not get so fired up about a change as long as you don't do too much at once.