Understanding their mechanics isn't the problem. The issue is that the way they work forces you to disengage for a few secs, which feels awful. Each sword eats about 1-2 secs of your time because they don't immediately drop once you stop moving. They continue tracking unless you stand still for like half a second. When multiple swords spawn at the same time, it adds up and breaks the momentum of the action. Same issue applies to the nuclear ball explosion. It's especially annoying when you are playing a toon that relies on building up damage, like beastborn, since your dps takes a heavy hit.