I don't see a place to set the leading for text. There is a relative setting in Paragraph but that is not good enough for graphic design. The leading must be precisely adjustable. My apologies if I missed the setting.
Another thing concerning text, when I import an Illustrator CS6 document, it appears that I cannot make changes to the existing text. This is also needed for graphic design. I have thousands of existing documents that I would need to be able to import and change if I was to use Designer instead of Illustrator for my work.
I have already purchased 2 copies of Designer, it has great features and could potentially replace Illustrator for any job where the requirement is to send a PDF file for final output such as ads and some digital printing. One big problem is packaging. For these projects, native Illustrator files are sent to the printer so that bleeds and overprints can be adjusted by the printer. You might need to be able to round-trip files back to Illustrator (AI format) in order for this to work because this is an established workflow with most printers, especially in the USA.
Again, my apologies if this has already been discussed.