To play the devil's advocate here; If you want nothing to change, don't update. In this case we could have prevented this change, but there are always behavioural changes, even when no settings are changed. I understand you are annoyed that it's something that directly impacted you, but stating that nothing should change is simply unrealistic.
I do agree that in this case it should have been put in the profiles and not in the default behavior. Then again, we would have most likely put it in every profile with pretty much the same result.
Adding the temperature isn't all that silly as you think it is. If you read the github issue about this (https://github.com/Ultimaker/Cura/issues/1315) the reasons for this are explained.