I know, a bit late, but shouldn't it actually be possible for several accounts (friends) to share different games at the same time?
Somehow that doesn't work for me. But it is possible to set the console as the primary PS4 on several accounts and also to download the games. However, with an account from which I want to share a game, there's a lock on my user. Is that because I already share from another account and you can only share from one or is this error somewhere else and needs to be fixed?
As long as the games have not been published, the other accounts on which it was not purchased will have a lock symbol instead of the countdown. However, this disappears as soon as the game is published, from then on it can be played as normal, no matter how many accounts you share.