I agree with all of these, I haven't use H13 yet, but I have a concern related to the new data tree.
At the moment it looks more like a spreadsheet to edit properties, it will have an API to modify and adapt what to show and how to modify it, this is good but is a different approach to a "linker" widget. And spreadsheet doesn't offer the functionally of a linker.
I believe that a data tree is needed but a "Data Linker" is also much needed.
Just imagine a plugin oriented data linker pane, where you can create plugins to define what to link and how. Also being able to use an embed data tree.
Then provide a plugin called "Render Linker", and the code of the plugin so every studio that needs it can expand and modify the default render linker.
Sounds like a dream