Adobe. For real. Not sure why this isn't built in yet. Simple vertical alignment within a text box. I can freaking do that in PowerPoint.
If you're re-using a design with different text copy of varying lengths, and the content needs to be centered within the design, it's not very efficient to have to re-size the text area and re-align with elements. Sometimes the element fades off, so where you want it centered isn't necessarily within the exact center of the element.
Anyway. All that to say...
Just add this already. Please. Pretty please. With cherries and all that crap.