Elizabeth,
I guess I have two questions that would guide me in deciding what to do on the high school level with any of my kids:
1. What are our family priorities in homeschooling?
2. What does my teen want to accomplish in high school?
So the curriculum decisions I would make would flow backwards from our end game (family priorities) and my teen's own agenda. I always thought my role at the high school level was to support my teen's goals. I spent more time helping my teens establish goals then I did choosing curriculum for them. They did most of the decision-making, and some of their decisions weren't the best. But then they learned how to make better decisions. I think I saw the fruit of this approach then when they were in college, where they paid their way and made all their scheduling choices. ( We certainly were adding our two cents from the sidelines, though.) They made fewer mistakes then because they had the experience from high school under their belts.
Does this speak to your situation in any way? Raising an independent learner was one of our family priorities in homeschooling. Of course it was subsumed under our highest priority, seeing them embrace and mature in our Christian faith.
I was somewhat concerned about the content we covered, more concerned about the skills we acquired. But again, this is just what we did. I really, really believe the glory of homeschooling is the opportunity to individualize our program for each child; so I think there should be a lot of diversity in what we each do. Anything in my books should be taken as suggestions and illustrations for your consideration.