Findarato, do you mean the complete skins? I just came back from my vacation, so I didn't do any work on that yet, but I'll do so eventually. No ETA though.
Eloora and
Pixi, unless you are also worried about download sizes, there is an easy workaround to your problem: Just right-click any file you want to keep, select properties and check the read-only flag. That way those files won't get overwritten on an update.
Ms.
silverstep05, in the meantime you should be able to resize the bars by using the function to hide the buttons which is included in the control center.