What we need is a more reliable ability to restore data to apps, particularly across phones. This used to be possible with 3rd party apps, but they borked it a long time ago.
Nah I don't think that's it, rather the app data is tied to that specific phone via a number Google assigns to it. So, if you go to a new phone, or even factory reset your phone, you cannot restore data - even using root and apps that would backup the app data folder. Like I say, it used to work, it hasn't for years.
Neobackup, thanks, I'll give that a try. I've used Titanium Backup back in the day, and maybe one or two others, but not had any luck with restoring into a new install.