to be honest they should change the redistribution of units with high range to low amounts of shield hp and frontal units to higher amount shields its the most effectiv way to nerf protoss vs terran (while not changing pvz to much)
since terran uses only ranged units a protoss can disengage a bit better than aswell terrans get the abillity to wore the key protoss units easier down which are in the back
that was also the major reason tempest/Carriers where so sucessfull even vs terran since they rarely get trough the shields which healed afterwards
then also a whole number of protoss nerfs and zerg buffs wouldn’t needed to happen since zerg would have still lost a army at a skytoss army but a second wave would have easier done the job then
but still that just my opinion