[2020] Can someone explain to me how "bugs ignoring dead players" was a bug that had to be fixed?

I honestly feel like it's the way to go, if a player is dead the bug horde shouldn't focus on them and focus on the players that are alive.

The new "fix" now makes the hordes act in a really stupid way where they'll just focus on the dead player and you can clean them up from far away.

Like here: https://streamable.com/khx52, The Detonator is completely focused on the dead player allowing me to keep on attacking him, and even when doing so, The Detonator doesn't care and keep focusing on the dead player instead of me, the one attacking it.

This feel so cheesy and make the AI feel very dumb, I hope they reverse this back honestly.