Libs and mines are the counter to ground toss styles. Libs counter all ground toss and mines prevdnt stalkers from blinking under to clear out liberator positions. Lib range and mine splash radius nerfs are truly massive reductions to terran performance in pvt.
Toss is super messed up, and that is the case right down to the basics. Toss units suck split up and are op grouped and that makes deathballing good. Deathball is easy to use, making toss op in gm and below, but lacks tge positioning refinement needed to win premiers so it sucks at pro level. Carriers for example are op in s cluster but split up theyvare easily picked off.