I modified the battery reporting task a bit by setting up 3 profiles in Tasker. One runs the Battery Level APP when battery is at 50%, one for 30% and one for 15%. So now my watch tells me when the battery reaches those levels. Perfect.
I've also managed to turn my "silent for 1 hour" task into an App which can now be called from the watch, together with a "resume volume" task/app.
My existing profiles for setting silent mode for various periods of time, including user defined and when calendar event is busy, have now got a Notify entry in them set at 2 minutes before the phone comes off silent. So I get a warning on the watch when the phone is about to go into normal volume mode, and if a meeting is running late, I can activate an additional silence period from my watch, rather than getting the phone out.
I'm sure i'll think of loads more applications for this setup