This might show up twice, I think I sent it from a bad address previously. If so, please accept my apologies.
In Fedora 22, one developer (and only one) decided that if the password chosen during installation wasn’t of sufficient strength, the install wouldn’t continue. A bug was filed, and there was also a great deal of aggravation about it on the Fedora testing list. So, it was dropped.
However, like a US (and probably other countries) politician who has one bad law suddenly exposed, it seems they are doing it for F23, judging from a test installation. I’ve filed a bug if anyone wants to chime in and ask them not to do it.