I'm also trying to find an alternative to instapaper. As I understand it, unless you pay for pocket, you can't save it offline? It's been out 24 hours for me as well, very inconvenient and I lost all my content when it tried to re-upload
I use a combination of Instapaper and Pinboard. You do need to pay for the offline mode, same as with Pocket by the sound of it but maybe Pinboard would be a suitable alternative for you?