KDE upgrade on Gentoo: 4.11 to 4.12.3

Recently I have noticed that while many of my kde packages are Upgradable (Blue highlighted "U" in emerge's output), they were not getting upgraded.
After browsing some forums and attempting to explicitly install a kde 4.12.3 package and having it failed, it appears I may have found the solution.

It may seem like a simple solution, but I am using layman to manage all my kde packages so I assumed that when I ran layman -S or layman -f, it would have updated my kde keyword to reflect the latest packages.

This was not the case, so I created this file in the path: /etc/portage/package.accept_keywords/kde-4.12.3 and inside it, placed all the packages the output listed that had dependencies. Since it was a bit of effort to find, copy and paste into the file, I'm listing it here for those interested.

=kde-base/kcmshell-4.12.3 ~amd64
=kde-base/kiconfinder-4.12.3 ~amd64
=kde-base/kwrite-4.12.3 ~amd64
=kde-base/oxygen-icons-4.12.3 ~amd64
=kde-base/khelpcenter-4.12.3 ~amd64
=kde-base/kdnssd-4.12.3 ~amd64
=kde-base/knetattach-4.12.3 ~amd64
=kde-base/kdontchangethehostname-4.12.3 ~amd64
=kde-base/kstart-4.12.3 ~amd64
=kde-base/keditfiletype-4.12.3 ~amd64
=kde-base/kmimetypefinder-4.12.3 ~amd64
=kde-base/kurifilter-plugins-4.12.3 ~amd64
=kde-base/kdepasswd-4.12.3 ~amd64
=kde-base/ktraderclient-4.12.3 ~amd64
=kde-base/kdebase-menu-4.12.3 ~amd64
=kde-base/kdesu-4.12.3 ~amd64
=kde-base/dolphin-4.12.3 ~amd64
=app-office/akonadi-server-1.11.0 ~amd64
=kde-base/nsplugins-4.12.3 ~amd64
=kde-base/kde-base-artwork-4.12.3 ~amd64
=kde-base/kuiserver-4.12.3 ~amd64
=kde-base/svgpart-4.12.3 ~amd64
=kde-base/konsole-4.12.3 ~amd64
=kde-base/kdebase-runtime-meta-4.12.3 ~amd64
=kde-base/kdebase-desktoptheme-4.12.3 ~amd64
=kde-base/katepart-4.12.3-r1 ~amd64
=kde-base/nepomuk-widgets-4.12.3 ~amd64
=kde-base/kquitapp-4.12.3 ~amd64
=kde-base/keditbookmarks-4.12.3 ~amd64
=kde-base/drkonqi-4.12.3 ~amd64
=kde-base/kglobalaccel-4.12.3 ~amd64
=kde-base/kfind-4.12.3 ~amd64
=kde-base/kdebugdialog-4.12.3 ~amd64
=kde-base/kde-env-4.12.3 ~amd64
=kde-base/kfile-4.12.3 ~amd64
=kde-base/ktimezoned-4.12.3 ~amd64
=kde-base/solid-runtime-4.12.3 ~amd64
=kde-base/kwalletd-4.12.3 ~amd64
=kde-base/kdebase-menu-icons-4.12.3 ~amd64
=kde-base/nepomuk-4.12.3 ~amd64
=kde-base/kactivities-4.12.3 ~amd64
=kde-base/kdebase-meta-4.12.3 ~amd64
=kde-base/konq-plugins-4.12.3 ~amd64
=kde-base/kdebase-kioslaves-4.12.3 ~amd64
=kde-base/attica-4.12.3 ~amd64
=kde-base/kdelibs-4.12.3 ~amd64
=kde-base/plasma-runtime-4.12.3 ~amd64
=kde-base/kcontrol-4.12.3 ~amd64
=kde-base/kpasswdserver-4.12.3 ~amd64
=kde-base/kdepimlibs-4.12.3 ~amd64
=kde-base/phonon-kde-4.12.3 ~amd64
=kde-base/kwalletmanager-4.12.3 ~amd64
=kde-base/kfmclient-4.12.3 ~amd64
=kde-base/konqueror-4.12.3 ~amd64
=kde-base/kimgio-4.12.3 ~amd64
=kde-base/nepomuk-core-4.12.3 ~amd64
=kde-base/plasma-apps-4.12.3 ~amd64
=kde-base/kdebase-data-4.12.3 ~amd64
=kde-base/kdialog-4.12.3 ~amd64
=kde-base/renamedlg-plugins-4.12.3 ~amd64
=kde-base/knewstuff-4.12.3 ~amd64
=kde-base/libkonq-4.12.3 ~amd64
=kde-base/kioclient-4.12.3 ~amd64

Now you must know that this will require updating when new packages are released, so this isn't a proper solution. However, since the maintainers at Gentoo and KDE are working on plasma2 and KDE Frameworks 5, it is likely that there will be a proper upgrade path and all that will be required is the deletion of this file and a simple upgrade world.

I don't guarantee anything will work, these are just my thoughts and solutions.

Cheers.