V15 User Profile not working with V16 update

I created a custom user profile for V15 that retained my toolbar/menu arrangement. My thinking was when upgrading to V16 all that would have to be done was set my custom V15 user profile as the default and the toolbar arrangement would be retained, which it has but I no longer have the new toolbars/commands that came with V16. Is there a way for this to work or do I have to mess with the CUI via partial loads and etc.?

On a side note I did try loading a empty CUI and then partial loading the default but it ended up a mess - no menu's, work spaces. Someone needs to put up a nice tutorial on how to set up an empty container CUI so you can partial load whatever else you need, it's so confusing and nebulous to me! Thanks ahead for any comments.