Is there reason to delay my UA?

I heard something about UAs made after the revamp having the proper amount of health and inventory space, but I'm not sure if it's actually true or not since it was just a rumor I heard from some henehoes.

There's a new skill you can get after making a UA that gives you an HP and MP boost depending on your class, but already made UAs can get it too. Inventory space was not touched.