This is what I am seeing today. I know I can let go of libgjs0c and libmutter0b as they are being replaced, the dev packages I am not so worried about but, I think the siduction-settings-gnome-december package should not be uninstalled.
The following packages will be REMOVED:
libgjs0c libglib2.0-dev libmutter0b libpcre3-dev
siduction-settings-gnome-december
The following NEW packages will be installed:
gir1.2-atspi-2.0 grub-theme-siduction-december libgjs0e libgnome-bluetooth13
libgnome-desktop-3-10 libmozjs-24-0 libmutter0d libupower-glib2
The following packages have been kept back:
cpp-4.9 g++-4.9 gcc-4.9 gcc-4.9-base libasan1 libatomic1 libcilkrts5
libgcc-4.9-dev libgcc1 libgfortran3 libgomp1 libitm1 liblsan0 libpcre3
libquadmath0 libstdc++-4.9-dev libstdc++6 libtsan0 libubsan0
The following packages will be upgraded:
accountsservice acpid apt apt-utils bluetooth bluez cheese cheese-common
chrome-remote-desktop cups cups-bsd cups-client cups-common
cups-core-drivers cups-daemon cups-ppdc cups-server-common e2fslibs
e2fsprogs eog extlinux four-in-a-row gambas3-gb-form gambas3-gb-gtk
gambas3-gb-gui gambas3-gb-image gambas3-gb-qt4 gambas3-gb-settings
gambas3-runtime gdm3 gengetopt gimp gimp-data gir1.2-accountsservice-1.0
gir1.2-cogl-1.0 gir1.2-coglpango-1.0 gir1.2-gdesktopenums-3.0 gir1.2-gdm3
gir1.2-gnomebluetooth-1.0 gir1.2-gnomedesktop-3.0 gir1.2-json-1.0
gir1.2-mutter-3.0 gir1.2-nautilus-3.0 gir1.2-upowerglib-1.0 gjs
gnome-bluetooth gnome-control-center gnome-control-center-data
gnome-desktop3-data gnome-power-manager gnome-session gnome-session-bin
gnome-session-common gnome-settings-daemon gnome-shell gnome-shell-common
gnome-shell-extensions gsettings-desktop-schemas gstreamer1.0-clutter
hexchat hexchat-common iperf libaccountsservice0 libapt-inst1.5
libapt-pkg4.12 libbluetooth3 libc-bin libc-dev-bin libc6 libc6:i386
libc6-dev libcap2 libcap2:i386 libcap2-bin libcheese-gtk23 libcheese7
libclutter-gst-2.0-0 libcogl-pango20 libcogl-path20 libcogl20 libcomerr2
libcomerr2:i386 libcups2 libcups2:i386 libcupscgi1 libcupsimage2
libcupsmime1 libcupsppdc1 libdebian-installer-extra4 libdebian-installer4
libdlrestrictions1 libfs6 libgdm1 libgimp2.0 libgl1-nvidia-glx
libgnutls-deb0-28 libgnutls-deb0-28:i386 libgnutls-openssl27
libgssapi-krb5-2 libgssapi-krb5-2:i386 libgssdp-1.0-3 libgtkglext1
libgweather-3-6 libgweather-common libice6 libice6:i386 libimport-into-perl
libjavascriptcoregtk-1.0-0 libjavascriptcoregtk-3.0-0 libjson-glib-1.0-0
libjson-glib-1.0-common libk5crypto3 libk5crypto3:i386 libkrb5-3
libkrb5-3:i386 libkrb5support0 libkrb5support0:i386
liblwp-protocol-https-perl liblzo2-2 libmono-cairo4.0-cil
libmono-corlib4.0-cil libmono-corlib4.5-cil libmono-data-tds4.0-cil
libmono-posix4.0-cil libmono-security4.0-cil libmono-sharpzip4.84-cil
libmono-sqlite4.0-cil libmono-system-configuration4.0-cil
libmono-system-core4.0-cil libmono-system-data4.0-cil
libmono-system-drawing4.0-cil libmono-system-enterpriseservices4.0-cil
libmono-system-runtime-serialization-formatters-soap4.0-cil
libmono-system-runtime4.0-cil libmono-system-security4.0-cil
libmono-system-transactions4.0-cil
libmono-system-web-applicationservices4.0-cil
libmono-system-web-services4.0-cil libmono-system-web4.0-cil
libmono-system-xml-linq4.0-cil libmono-system-xml4.0-cil
libmono-system4.0-cil libmono-web4.0-cil libmpc3 libmtp-common
libmtp-runtime libmtp9 libnautilus-extension1a libnss3 libnvidia-ml1
libpciaccess0 libpcrecpp0 libperl5.18 libpixman-1-0 libpixman-1-0:i386
libplank-common libplank0 libprocps3 libpython-stdlib libquvi-scripts
librlog5 librtmp1 libsasl2-2 libsasl2-modules-db libsm6 libsm6:i386 libss2
libsub-name-perl libtracker-control-1.0-0 libtracker-sparql-1.0-0
liburi-perl libwebkitgtk-1.0-0 libwebkitgtk-1.0-common libwebkitgtk-3.0-0
libwebkitgtk-3.0-common libx264-142 libxaw7 libxdamage1 libxdamage1:i386
libxfixes3 libxfixes3:i386 libxfont1 libxft2 libxft2:i386 libxpm4 libxvmc1
linux-libc-dev locales manpages-de mono-4.0-gac mono-gac mono-runtime
mono-runtime-common mono-runtime-sgen multiarch-support mutter-common nano
nautilus nautilus-data ntfs-config nvidia-alternative nvidia-driver
nvidia-kernel-dkms nvidia-vdpau-driver openjdk-7-jre openjdk-7-jre-headless
perl perl-base perl-doc perl-modules plank pm-utils procps python
python-minimal rsync siduction-art-gnome-december
siduction-art-wallpaper-december strace syslinux syslinux-common tracker
tracker-gui upower virtualbox virtualbox-dkms virtualbox-qt x11-apps
x11-utils x11-xserver-utils xauth xfonts-encodings xfonts-utils
xserver-xorg-input-synaptics xserver-xorg-video-nvidia