I guess I don’t have much to say about the matter other than to observe Manjaro users having batch-update problems such as the most recent as long as I’ve been a member or lurker in these forums. And that has been a while (original forums registration date 15 November 2013)
I will state that from an observational and user standpoint, it was a whole lot worse in 2013 than it is now.
Part of it appears to the procedure–this whole batch-updating procedure–which is unknown in Arch Linux. Part of it seems to be the requirement to read and explicitly follow @philm’s update announcements. And the last would appear to be user-ability, meaning maybe Manjaro is not so “beginner” or “new user” friendly as some think, or perhaps those users have not yet developed an updating practice that considers the nature of the distribution (i.e. using a GUI-d package manager helper to perform upgrades/updates, not reading the News, not reading forum announcements.) You can’t fix what never exists. Those same users would also have problems with Windows or any other OS, would be my guess.
What the “cure” is, I do not know. Or even if there is one. But it appears to me much of Arch’s stability–which includes updates–is lost-in-translation between where it starts in Manjaro Unstable and ends in Manjaro Stable, the final product.