The Collector Leviathan’s harp is an amazing feature! I love the way that it slowly becomes more eerie and out of tune as it echos throughout the biome, giving you a sense of dread and they way that the song pauses perodically always makes me stop, wondering if the song actually ended and the PDA glitched and forgot to tell me that the Harp went out of tune again.
First, I would love to suggest that the PDA only mentions that the harp has stopped a little after the Leviathans are freed from the song - that way you always are watching over your shoulder as you’re trying to get things done. The PDA simply states that it hasn’t heard the song for a while or something along those lines.
Second, I love maxamizing my resources and risk/reward mechanics. We are putting the harp back into tune, allow us to “overtune” the harp, the pitch getting higher and higher, but if we tune it too much - like a guitar’s string - it snaps!
The player is punished for wanting that extra time and getting too greedy and either now they need to take the time to repair the harp if they want to use it again.
Or the leviathans are sent into a rage! They remember the harp from the Axons of the past, and this music, something they haven’t heard for decades was just dangled in front of them, hypnotizing them to return to the reawakened song just to break in front of them!