I think this could help sometimes to get up to speed, if you could provide XAML code snippets for your controls! http://timheuer.com/blog/archive/2013/07/08/xaml-code-snippets-for-visual-studio.aspx
I would like to thank you for sharing your valuable feedback. After some further investigation, the development team concluded there is not enough information so that they can proceed with introducing such code snippets. In case you would like to ask a specific question on the current Theming mechanism, you can submit a new support ticket through the online ticketing system (http://blogs.telerik.com/supportdepartment/posts/13-03-08/how-to-submit-a-support-ticket) and share as much information on the exact case as possible.