Edit mutiple titles at once.
The possibility to edit multiple titles at once. As simple as selecting all titles, go to the edit tab in essential graphics and do the changes affecting all selected titles. If the selected titles have different setting (size, font etc), then they all change to the new settings.
If you are talking about selecting and editing multiple layers together inside one Graphic, then this is already possible and has been for several versions of Pr.
If you are talking about editing layers together across different Graphics in a sequence, then that is possible already using Master Text Styles... https://www.premiumbeat.com/blog/master-text-style-essential-graphics-panel/
As for editing Graphics together directly, that is a good request and one that we already have several votes for here on User Voice.