Personally, I would solve all of these by pushing the message up, like sending it, but with colors that make it clear that it's suspended, and a clock icon, whi

Personally, I would solve all of these by pushing the message up, like sending it, but with colors that make it clear that it's suspended, and a clock icon, which shows when it will send. Long press the message to get a context menu: edit, delete, reschedule, send now. As for sync and all that, whatever algorithm they use for Notes is fine with me. I would expect the message itself to be living in iCloud until it's sent, so most of the questions about losing network connectivity or not having battery life wouldn't apply. So no, no SMS: support for SMS in Messages is an afterthought and I would in fact prefer two different apps, although I might be the only one who feels that way.