Why not give control only to the cabin crew?
It wouldn't be practical for you, because you wouldn't like what the cabin crew would do if they had control: they would dim all the window shades.
What you would need to satisfy your wants is the additional factor of a directive from the airline that if the sun is shining outside, the cabin crew must force all the window shades to "open".
The fact that all of the window seat occupants closed their shades tells you something: that is what the majority of passengers want. The same behaviour can be observed on very many daylight flights on many airlines. If you think that the airline is going to require everyone to sit in brightness when the truth is that the majority of passengers would voluntarily dim the cabin, you will be sorely disappointed.
As others say: if you want natural light in your seat, get yourself a window seat (as you did on the inbound flight).