codah, haha I don't think I will be doing any text as I have absolutely no idea of how to determine the json settings for them to be used as text sprite. Using text simple as sprites I don't think is efficient in terms of memory and performance. If you mean menu type backgrounds, I could do it based on the themes of the button though. Hmmm...I will take a look at it when I am free and see what I can come up with.
Actually I created a 9patch using your graphics (as a trial) and it works fine
Edit: I didn't mean actual text, just some backgrounds like for message boxes.