Benefits of Dynamic Typography:
It is lighter, as it only writes additional CSS for Target Elements that you add. Whereas the older typography wrote some styles by default.
It has full responsive controls, so you can set separate sizes for Desktop, Tablet and Mobile if you need them.
More Unit sizes we include REMs, EMs and Pixels.
Has More individual elements like the one you require.
And it has custom elements, so you could create a unique style for some HTML that the theme doesn’t control 🙂
Regarding other updates – that is the only user opt-in update at the moment. Other options in General – are simply options.