Hello,
just a short report:
I've taken indian summer lxde as basic system
After dist-upgrade and adding kdenext and kdenext kf5 repo, I've installed the following stuff:
kde-standard plasma-desktop kde-l10n-de sddm
kf5 starts slow, when trying to change kmenu style I get a crash of kdeinit5.
After installing metapackage kdesdk kf5 starts fast and a change of kmenu style works.
When installing kdesdk I see some packages like dolphin. In my opinion metapackage plasma-desktop or kde-standard should contain dolphin installation because it is a core application.
Kind regards,
Holger
P.S.: Please add konsole also to metapackage plasma-desktop. And please give a short description, how to add kf5 to a siduction installation. The description here
https://community.kde.org/Plasma/InstallingNext#siduction is for people, who have already installed kde. Perhaps other users with lxde, xfce4 or gnome also want to test new kf5 stuff.