On the subject of updates:
I bought a Motorola G5 a couple of years ago because it was one of the few phone in the UK with dual SIM as standard (working in remote areas necessitates multiple carriers)
Anyhoo, they did a big system update last month and it totally screwed the stock camera app (Barcode/QR scanner gone, options to reduce filesize gone, choice of aspect ratio gone)...and many more.
It was still a decent picture (that one of Ben A'an on the Today thread was taken with it) but you were stuck with 16:9 at max res and a shitty interface. so far less than ideal.
Turns out the solution was to simply disable the camera app, then enable it again...and it reverted to the previous version.
(As far as I can gather, it's the same app for a number of models and this update was meant to fix some issues on others, so I'm glad that they have the option to roll it back if you don't need it.)