Releasing an unfinished version, wouldn't give a good first impression of the OS. And as the first impression is really important I think Hyperion makes the right thing not releasing the OS with bugs that can easily be avoided if not releasing it in a rush. Probably PC computer mags are going to review it when it's ready, so I don't think they want to release an OS that is just half ready.
I don't think OS4Depot has all software for OS4, as all software from there is free to download. Then as the OS isn't ready yet I think we can expect more software when it been released.