Depends what you mean by deathballs. SC2 generally does not encourage significantly splitting up your main army in mid-late game. So ya, main armies are still

Depends what you mean by deathballs. SC2 generally does not encourage significantly splitting up your main army in mid-late game. So ya, main armies are still normally moving around as a single blob/body. I think every race still has enough tools to punish a-move, stacked/bunched up ground armies (lurker, baneling, widow mines, tank/liberator, psistorm, disruptor) that even if a ground army moves as a clump, there's significant pressure to quickly micro and split on contact. There was a recent-ish period where there was a lot of dissatisfaction about late-game protoss air basically being a death ball, especially against zerg. I think that has somewhat dissipated - they released a patch that made disincentivized getting to that state, but I suspect that dealing with late-game protoss air is still annoying as heck for zerg.