I would love to have the ability to "justify" (MS Word) or "align full" (this tool). Typically, when we need to add text to a viz, it's a pdf handout for administration. The text is necessary to explain the finer details of the data. It would be nice to hand out a more professional looking document. while it's great that the text is responsive to changes in the size of the text box, I spend a lot of time trying to get the end of the lines to be close to equal and also not have a "-" on every ending of a line.
We often put some context on our visualizations and the text tools offered currently are pretty minimal (left, center, right):