You may be right that what happens after a breakage is different — but that was always extremely variable from one developer to another anyway. So you'd need a reasonable sample size, over time, to really be sure of that.
I'm also not sure that such a change, if it's real, could necessarily be blamed on the no-frozen-rawhide thing. There have been other changes in Fedora packaging over time. There's much more of a focus on "packagers" these days, and much less on "package maintainers" who actually get their hands dirty and work on the code. This naturally translates into a much less happy experience for those who file bugs.