At this point, I would say that the Cross-site Authenticated Reading List has been abandoned for good rather than just held off, especially if you consider that LiveJournal is already blocking all API access from Dreamwidth servers and ghosting the owners, so giving them other, likely much more serious, reasons to do that sounds like a Very Bad Idea™. Among the ones that have a chance of happening, getting the new entry posting and editing page out of beta feels the biggest to me. YMMV.