I had a custom UI back when I played on live that used a custom actions window, added another tab on it called Pet that had a pet health bar, and used 10 or so of the blank social buttons to form a more functional pet window. It worked quite well, tbh, and it freed up the 'real' pet window for... something else, I don't remember what they used it for, but the UI was pretty darn good. A clock, maybe, I don't remember. Anyway, I bet someone with some XML skills would have no problem doing something similar for SoD.