I downloaded and tested the widget and here are my impressions and suggestions:
1) The cpu usage with only the sidebar activated is ~15-25% that is not optimal but doesn't make the widget unusable..
2) You need to find another system so the mouse over menus work properly. When you try to click on these buttons, they disappear again and are really hard to use and "catch" them. You need to work with the layers and the mouse over area.
I see that you added the right click option to turn-off this, but it needs optimization.
3) It will be better if you add "Hints" for each button to explain what each button does (more easy to find).
4) Since I saw that the titles are created with "empty" images and you used the "Fill Color" option, you can use the RGB color selection, so the users can edit the title color. Example:
http://jimking.deviantart.com/art/Win8- ... -4956349255) It will great if there is the "sizegrip" for the titles
6) If you can't add the above, I think that you need to decrease a lot the dimensions of the titles to have better cpu consumption.
That's all

pm: As I told you the uploading system requires one .xwp file and with <10Mb size.
If you can package only the sidebar and the size is ok, I can upload it to the gallery.
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