Having multiple objects selected is very inconsistent, as sometimes what you do affects all of the objects, and sometimes it doesn’t (mostly properties it seems).
I know I posted here a lot, but this is probably my number 1 paper-cut (it was second only to right-click select, and that’s now fixed, and the outliner, which apparently will get mostly fixed in 2.81).
Always have whatever interaction you perform apply to the entire selection.
If people want the old (non-industry standard) behavior, put that in a setting.
This has been mentioned several times in the main thread, and I even believe that I saw it mentioned that it would be the default in 2.8 at one point, but now that it’s out it’s clear that this wasn’t done.