This should be a no-brainer to implement:
When inside the planet overview screen (where it lists all the planets and what they are building), insert a row above the production icons that lets you refocus ALL planets to that particular production.
In my last game, I had all of my planets focused on research (about 50 planets) and I then researched a bunch of planet improvement techs and needed them built quickly. I had to go to each one to shift the production focus to social production.
As an additional feature request, it would be absolutely wonderful if you could prioritize the auto-upgrading (this might take a while to implement). Basically, I want to be able to tell my governers that, regardless of what is being built now, if a new production upgrade (like factories or enhanced factories) becomes available, put it above everything currently in the build-queue. Just having it do that automatically would be fine for now, but if I could also order things like upgrades to research come after factories but before terraforming, and more complex stuff, that would be amazing. Again, this is not a priority, it would just be a big timesaver and would cut out a lot of the work in playing this game.
