Who is the target audience?
If I understand correctly, the target audience for the weekly Tech news and the monthly VE news is experienced active editing Wikipedians (I don't know if it was ever designated, but I am making an educated guess of the actual practice).
But what is it for the mobile newsletter?
Active editing Wikipedians don't do it much on mobile AFAIK, although it may be defined as the newsletter's goal to increase this number.
Wikipedia readers? There are many millions of those on mobile, but do they read the newsletters? Certainly not on Village Pumps. Maybe it could be delivered as a notification in the mobile web or in the apps?
What else?
New editors?
Projects' JS and CSS maintainers?
Gadget lovers?
Twitter aficionados?
Somebody else?
This target audience should be defined before starting to publishing it.
(N.B.: I didn't mention translation!!! :) )