Contributing to core is definitely a big thing and difficult to do. Takes a lot of time and effort. I didn’t put in that time this release, which is why you’ll notice my name is missing from the credits screen for the first time in a couple years (none of my patches got accepted ?? ).
Still, this change was made 2 months ago. Anybody running the beta should have spotted it then. I realize that not everybody runs the beta versions, but that’s pretty much a prerequisite for having a say in the conversation, because without doing the testing as-it-happens, you don’t see the changes when they are actually made, just months later after release.
If you have a personal site, or a test site, consider using the Beta Tester plugin to get nightly updates to it. Sure, it might break once in a while (not often), but you’ll get to see what’s happening and changing as it happens and changes. We run all our sites (including this one) on the very latest and greatest code, so that we’re aware of what is changing and how it affects things. Stable versions are for those who cannot handle an unstable world. ??
BTW, I never really use the Title field myself. I just like having plugins to solve problems like this, when core changes in unexpected ways.