Earlier quoted context omitted.
To clarify, ZK doesn't population caps like e.g. Starcraft. The actual limit is actually the CPU/GPU (and maybe your bandwidth too). ZK's 16vs16 host, the "lobster pot" as they call it, can barely be playable if your rig is too weak.
> ZK doesn't population caps That sounds like poor RTS design. Popcap is one of the simplest and most effective "anti-snowballing" mechanisms. Once you're "maxed out", you cannot get further ahead - you must attack and trade to build new stuff. If you can just keep making stuff without ever being forced to trade, whoever gets ahead first, eventually wins. Supply also serves as a comeback mechanic - you were even, but…
Comebacks in high-level SC2 games don't usually happen as you say. More often, the losing party relies on their opponent overlooking some peculiar tactic like using DTs (for those who are not familiar with SC: invisible units that can only be detected with specific means). Otherwise a bad engagement very often means defeat in short/mid/long term.
Finally, ZK does have very long range static weapons that can hardly be countered (unless you destroy them). If the opponent "camps" in their base, you just start to build one that will either vaporize their army or buildings, or slowly wear them down. But really, camping is usually newbie-level strategy.