No they shouldn't do that. I have been a beta tester for two years, I have also been an alpha tester. I have been a selected tester that was in a special group with all the Facebook developers. The problems do not get fixed almost immediately, they fix what they want to fix only. There are still problems on the Facebook app that several of us started discussing with the developers almost two years ago.
The problem is the pre-installed Facebook app and it updating outside of the Play Store.
I've also spoken to them about this issue of the updating and the Note 4, even though they are violating Google Policy, and their answer is buy a phone that doesn't have Facebook pre-installed.