"What if I want to KickStart a Desktop machine and don't want it to be a live image?"
Use Server. The Server network install image is the canonical thing to use for non-live installs of any kind, basically use it just as you'd use the netinst.iso in previous releases.
We're aware this sounds a bit weird, sorry about that. I can give you the *extremely* long version if you like, but the short version is that when it came to actually *implementing* the Product stuff there were the kinds of 'oh, so that doesn't quite work the way we thought it would' moments you'd expect in making such a significant change to an existing distro with existing release engineering tooling.
The upshot of one of them was that having Product-ish network install images turned out to be basically impossible to do, and after a while of banging our heads on trying to fix it we figured, you know what, we don't really need them anyway. Given how the practical implementation of the Products turned out for F21 at least, we can just have a single network install that can deploy anything, just like we did before.
Unfortunately by that point it wasn't really practical to try and set up some kind of new/old tree to build it out of and give it generic branding, so the story for F21 is: for anything like that, use Server. Use the 'Server' network install image for doing any kind of non-live deployment - the only 'Server' things about it are the visual branding and the fact that it *defaults* to the Server package set, but you can successfully deploy any Product or non-Product package set from it, it's functionally little different from the F20 generic network install image.
The Server/ tree on the mirrors is also the canonical source of things like the PXE boot kernel/initramfs, and the fedup upgrade initramfs.
Again, this obviously isn't optimal design, it's just kinda how things worked out in the F21 timeframe (there are some really boring release engineering considerations behind it all that I can explain if you're having trouble sleeping). For F22, all being well, it'll be cleaned up.
The 'Fedora' DVD wasn't actually an 'Everything' DVD, for the record. The repo tree called Everything has literally every package in it but is not 'composed', i.e. it doesn't have installer images and we can't build release media out of it. It still exists for F21. The Fedora repo tree in previous releases (it doesn't exist in F21) was what the DVD and netinst images were built out of. It didn't contain all packages, it contained the set of packages that was chosen to go on the DVD media - substantially fewer than are in the Everything tree.
The 'Fedora' generic DVD image was dropped as part of the whole Product-ization approach, basically the idea being there's a Product image or live spin for most use cases, and install via the Server netinst covers other cases. The specific case of 'I want to do an offline install with a custom package set that's covered by the old Fedora DVD package set but not the new Server DVD package set' is lost with this change, yep, we're sorry about that - ultimately to make a significant change like Products *something* had to be lost, and that's one of the things that was. The Fedora/ tree in the repos doesn't exist any more because its purpose was to build the Fedora DVD image.