You can substitute some measure taking the structure of your preferences into account, e.g. some measure of the difference in your utility* between their and your perfect political outcomes.
Absolutely. That is exactly what you have to do. My point is that if you have:
utility = sum over policy areas of ability-to-change(policy) times (your-worth(their-preferred(policy)) - your-worth(default(policy)))
Most summaries of ability-to-change(policy) as a single number will have examples of your-worth(their-preferred(policy)) such that increasing their overall ability to implement their platform does worse, even in the cases where they broadly agree with you.
You can substitute some measure taking the structure of your preferences into account, e.g. some measure of the difference in your utility* between their and your perfect political outcomes.
*pretending that humans have utility functions
Absolutely. That is exactly what you have to do. My point is that if you have:
utility = sum over policy areas of ability-to-change(policy) times (your-worth(their-preferred(policy)) - your-worth(default(policy)))
Most summaries of ability-to-change(policy) as a single number will have examples of your-worth(their-preferred(policy)) such that increasing their overall ability to implement their platform does worse, even in the cases where they broadly agree with you.