I suspect many of the issues are actually problems with Fedora (it seems I have a mix of 3.13.9 and the previous release) but I'll list them anyway, just in case.

* Apps are actually launching under xwayland by default. Everything segfaults if launched with GDK_BACKEND=wayland.

* I use dvorak. Xwayland honors the setting but the shell is still qwerty.

* Two-finger scrolling works in xwayland (though twice as fast as usual) but not at all in shell.

* Restarting shell kills running apps and afterwards only Web will open. And it has the app menu and min/max button in the headerbar.

* External monitor not recognized, works fine under X