In light of the btc fork-fest, I've changed the payout currency from btc to eth in the bat file. Let's see what happens.
Will that be reflected somehow on the zpool stats page? Would I have to switch my wallet address (currently my btc address) to my eth wallet address for it to work/payout correctly?
yes--change it to your eth address immediately. you will lose eth tokens you mine on your btc address (and vice versa).
always change to compatible address of coin you are mining.