If there's a need to shore up a specific time slot
I'm pretty sure it was said that the time slot in question was around the time Yu would be going to sleep.
If true, that time is when LC and Chronic are still trailing online, close to going offline themselves and Flee and Psy are coming online.
It's one of the lowest points in the day activity wise too.
Hardly something to crow about.
That's if remember what was said right however.
Comet isn't a bad choice at all, there are more than a few members way more active that could be chosen as a mod, but I presume the staff chose with more than "This user is nice" when they did choose Comet.
So if someone doesn't like it, best thing to do is PM Cheat or grin and bear it.