>Although I think that would be something more along the lines of the entropic levels, as such, perhaps Synn will leave this balancing to the God of the Void or even the God of Chaos.

I'm assuming that by God of Void, you mean Nihil. If that's not the case, ignore this.

Nihil would not be quite suited to causing death. Death means action, whereas Nihil is a being that actively strives towards inaction, but constantly fails to achieve such inaction. Death is something that he wouldn't quite be attuned to, because, the way he sees it, there is no disposal. Nothing returns to the void, in his eyes. 

That is not the same as saying that he would not be welcome to dealing with souls, however, his dealing with souls would be closer to removing them from existence, destroying them in their entirety. I imagine that, if this were the case, Nihil would be seen as a demon of some sort, causing people to believe that he has a realm of hell that is infinite nothing. Obviously, that is not truly the case.

>Or perhaps the God of Corruption would create more predators to serve as population control...

I think this could work much better than a god of void or chaos overseeing death. As a God of Corruption, Slatera could, in theory, corrupt the essence of life, creating death. (Also, that reminds me, Slatera did sacrifice the mark of death according to his CS, which he could do in character to remind everyone of this.)

Also, a general question:
What happened to the God of Sleep and Dreams?
If they are gone for good, then what should we do?
Of course, this is a question best left for the GM, so as to not cause any unwanted disturbance.