The Fedora Workstation was missing the 'gnome-software' package in the default installation which prevents users from handling packages in GUI.
I tested the latest builds (see below) and they both were missing the package.
Fedora Workstation was installed from the following build:
The Live version used to check was run from this build:
Packages to be added:
gnome-software should be installed by default
Proposed as a Blocker for 28-beta by Fedora user lruzicka using the blocker tracking app because:
The gnome-software package is considered a core application (according to https://fedoraproject.org/wiki/Workstation/Technical_Specification#Core_Applications). Core applications must be installed on the fresh system by default.
Seeing this on Fedora-Workstation-netinst-x86_64-28-20180308 still. 'gnome-software' must be installed manually.
This is the result of some dependency issue or other; it is *supposed* to be pulled in, but gets dropped from the transaction. Unfortunately, anaconda/dnf do not log anything when this happens:
so it can be tricky to figure out why.
I'd rather wait till we have another successful F28 compose and see if it's still the case than dive into this too deeply at this point. Network installs are still using the 20180302.n.0 package set since that's what's on the official repos, as there has not been a successful compose since.
https://bugzilla.redhat.com/show_bug.cgi?id=1552910 could be the dependency issue that causes gnome-software to be dropped.
Sounds plausible to me, yep. +1 blocker, anyway. That's +3, setting accepted.
shim-signed-13-4 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-9877df9844
The latest build of Everything-netinst  contains gnome-software in the basic installation of Fedora Workstation.
So does the Live image 
I think we can close the bug now, so it is no longer an issue nor a blocker.
shim-signed-13-4 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.