@ishcherb sure I can:
firewalld error: https://gist.github.com/decathorpe/93f32ad919183ca723223b7f83cff672
abrt-action-not error: https://gist.github.com/decathorpe/b534591422a782ebd5165ca65d7c840e
All of those are caused by python3 trying to write to a
__pycache__ directory ... maybe something changed in python that causes the interpreter to re-compile some cached files?
switchboard does not provide UI to change the GTK and icon theme (neither does gnome-control-center, for that matter).
If you don't want to install gnome-tweak-tool, you will have to resort to using the
gsettings command line tool:
gsettings set org.gnome.desktop.interface icon-theme elementary
gsettings set org.gnome.desktop.interface gtk-theme elementary
Beware that this will also override these settings in other desktop environments.
As a side note, please don't use bodhi comments for "bug reports", it's very likely that I won't see your comments here.