No rush in committing if you want to wait and go to admitted student days. But Princeton students do perfectly fine with grad schools (and Supreme Court appointments). It’s true that getting a high GPA can be a challenge in some fields. Engineering and natural sciences tend to have lower GPAs on average than humanities and social sciences. If that’s a big concern, you could consider a BA in Econ or woody woo along with a certificate related to ORFE. You’ll figure it out, might not be an issue if the BSE prerequisites come easily to you. I’d go where you feel comfortable