If you'd like to use the TEX fonts in your Draw diagrams then you can but you'll have to use !Chars to input the characters. The characters in the current set of outline fonts are not laid out according to the ASCII character set.
Currently, there is only tentative support for text areas in Draw diagrams. They should be drawn correctly but they will not save correctly and they may not print correctly on Postscript printers. Please let me know if you'd like text areas to be better supported.
The Draw file format has no provisions for cropping objects so saving a dvi page as a Draw file is difficult if the page includes cropped diagrams. DVIview attempts cropping by obscuring the diagrams with white rectangles, however, this cannot deal with all cases. DVIview will never obscure part of a diagram that it should be possible to see but it may allow cropped parts of the diagram to be visible (and these may obscure other diagrams). In general, this is not likely to be a problem unless you crop off large areas and have several diagrams to a page. Remember, this is only a problem for saving pages: on-screen viewing and printing will be fine.