I personally believe that the warmhole should be disappearing after it spawn all the wild waves it should spawn, so it still feels like an ANOMALY and not like something that is allways there for you:
“Ohh another beautiful day (or night), good morning wormhole”
“The night is comming but i don’t need any torch to light my paths on the dangerous lands of this isle, the light of warmhole is allways here to light my way”
If something is an anomaly, should it be up on the sky 24/7 ? It should probably not be like: Good morning Sunshine, so it can make us feel any of it’s uniqueness at all.
Second reason for wormholes to disappear is leaving the day and night cycle almost untouched. Do we still need a torch to see the monsters comming up on our faces from the dark if the “day” never ends ?
Another thing is that you don’t need a torch in a mastrom, which is at least somewhat understandable beacause the eye of the cyclone shines with the ominous scarlet light, but the lighting on different distance should vary (more than now?).