If they just added a checkbox for "Reroute 100% social manufacture when not producing a project" (with an easier and/or fancier name), I would be satisfied. Put your planets on 100% manu/research/wealth the moment you decide how to specialize them, and don't touch the wheel again unless in emergencies (or in the case of micro'ing production overflow).
Right now, there is way too much useless micro that could easily be avoided by a solution as simple as the one above.
And anyone arguing "just don't specialize" are out of their minds. The way the game is set up, specialization is a no brainer.. if I have 10 raw production, 800% bonuses from my massive network of adjacencies to research and only 20% to manufacture/wealth.. I can either set my slider on 100% research and get 0/80/0 research, or 33/33/33 and get 4/26/4
80 vs 34. It's simple math. And the game allows far, far higher multipliers than 800% in a proper specialized planet.
Edit: Call it "Maximize planet developement", would be my humble suggestion 