This is very exploitable and I’m sure someone has found it before. When you complete an echo and you die after the echo is completed, the reward is there for the taking, the monolith path is unlocked but the mod you are supposed to put on isn’t. Not only that, the mods already in play don’t deminish by 1.
This exploit allows people to run through echos with detrimental mods, compelate it, die, get the reward and unlock the path without putting in the mod itself. I can very easily see this being abused in high corruption, where monster mods matter way more.