I can definitely see how it can be annoying on the other planets, and once I get used to opening on different planets, maybe I'll want trigger techs gone there too.
I think you can keep settings simple, and just add toggling the entirety of Space Age. If someone wants anything more specific, they might as well open the code and take out the techs they don't want to change. It's amazing how beginner friendly you made editing it. I'm fairly sure the average player could independently figure out deleting the right function calls, with little to no understanding of the code.