I cut a new Fedlet release today, 20141111. You can get it from the Fedlet page.
The big improvement is working internal wifi on the Venue 8 Pro - many thanks to Jan-Michael Brummer for that. It has kernel 3.18rc4, which may possibly help other devices out, I don't know. It bumps the userland to ~Fedora 21 Final TC1 or so.
I figured out a way to make KMS graphics work on my Venue 8 Pro, too. For me, it works when I boot through the boot device menu (hold down volume up on boot). When I boot that way, early boot happens in a low resolution, then when KMS kicks in, it switches to native resolution. When I boot through the firmware UI, or just normally, early boot happens in native resolution, and KMS activation blanks the screen.
For me, graphics are extremely slow and wifi doesn't work after a reboot - the workaround is to power off fully and power back on, not just reboot.
If you have an earlier version of Fedlet installed, you may have wound up getting Rawhide - Fedora 22 - packages installed, instead of tracking Fedora 21. This is to do with Fedlet being a non-official build of Fedora - I didn't bother making a 'fedlet-release' package, I just use the 'generic-release' package that's shipped in Fedora, but it doesn't get updated very quickly and it wound up pulling in Rawhide repositories when it shouldn't have.
To fix it up, you basically need to get up to at least
generic-release-21-7 from the F21 repo, and install a 'Product' subpackage -
generic-release-nonproduct are the obvious choices. Remove
generic-release-rawhide. Then you can run
yum --releasever 21 distro-sync, which should pull everything back into line with Fedora 21.
The new release has the current
generic-release, so it shouldn't have this problem. I forgot to explicitly pull in a Product sub-package, though, so it got
generic-release-cloud, which is silly but shouldn't have any particular consequences. I'll clean it up in the next release.