Why are these separate ?
Proposal: Skeptic Exchange
Skeptic Exchange is for questions about pseudoscience, it is not for discussions about the existence or nonexistence of gods. Take a look at the top 5 on-topic questions for Skeptic Exchange, all of those would be off-topic on Atheism.
I strongly oppose merging those two, there is a certain overlap in the communities for those sites, but the content of the two sites is different.