I added a feature to a motion graphics template in AE, then saved it to my library (which didn't work at first because Adobe is still doesn't have a handle on what to do with library files) after deleting the old one.
Then I went over to premiere, dragged the template onto one of the existing titles while holding Alt to replace it. It then asked if I wanted to automatically update the others. Great! Thanks, yes please.
So here's the bug. The others Were updated. I can see the new element. But in the edit tab, all of the "automatically updated" titles don't have the new options.
I added a rectangle and some text. And I added to essential graphics, a checkbox to turn it off/on, the ability to change the text, and to change the speed. None of those things are visible in Essential Graphics > Edit. But then if I replace them each individually, it works fine.
So it's not that you can't replace them. It's that when premiere automatically updates the rest of them, it isn't adding the additional pieces to the edit panel.