Palka was always a DH and there might be a spot on a team for him. Sans Yonder.
But I agree with the OP, having Eloy in LF with his defensive shortcoming, you want to make sure CF/RF can cover some ground.
Going back to his stance, I believe one of J Fegan pieces talked about it being more open this season and somebody in the clubhouse pointed him to it.
Give credit where it's due. So far he is working out great, I hope he can stick around!