I'm currently trying out about four different Reddit apps before Sync becomes available. One thing I found is that after the big migration, and the servers now have a chance to breathe, the apps all work a lot better than they did when I first installed them.

That being said, Connect seems to be rising to the top as far as apps go. After some slight tweaking to the settings, I've got it working almost identical to how Sync worked. It's not perfect, but it's getting the job done very well.