First off, Login screen over Wayland, in effect the beginnings of getting rid of X. I've heard that Wayland is not mature enough for actual production machines; there just hasn't been interest or effort put into it, it doesn't appear that it's progressed much (unless I'm getting the wrong impression). I remember when there was first talk of it taking over X (along with another compositor, I can't recall the name now), it didn't seem like there was much interest then (this was some 3-4 years ago I think). I'm wondering if anyone here at the forum has run a distro where Wayland is the main compositor? More on Wayland and Weston here at the Arch wiki. I don't see where Arch has implemented it yet? It appears to be a "if you want to install it" thing with them.
The other thing that is bothering me is the change from Yum to DNF. I know absolutely nothing about DNF. Can anyone enlighten me on it, and as to its reliability please? True, it seems to be a ramped up version of Yum, but I'd like to know anyway.
The good things: kernel 4.1.x (at least that's good for me, *I think*, only an install would say for sure if it would work with such new hardware that I have, in particular, Qualcomm Atheros wireless. XFCE 4.12. Who doesn't love XFCE these days? I know I do.
KDE 4.1.3 - I can build my good ol' KDE desktop just for the helluvit.
Other things I see as being good as well, but won't blather on about them here.
I'd love to get some questions answered about it. It's been a very long time since I've run Fedora. I liked it then, as a dual boot with Arch (and would be the thing I'm considering doing again).