not sure if you are still looking for an answer, but rich text is possible on the 2.0 forms:
go to edit form section and click on the plus sign as if to add a new field and you will see 'rich text' option.
The question wasn't about it being "possible" -- you can see the OP mentions that she "love[s] the rich text field."
It's about the placement of the rich text area vs. ProgPro. Indeed you can relocate the area beneath the ProgPro area, but not via drag-and-drop.
See this post: Progressive profiling fields above required fields? and accompanying demo code: MktoForms2 :: Demo :: Override Field Order 1.0.1