SUBJECT TEST DILEMMA!

So I just took SAT subject tests for Math II and Physics and I don’t think I did well plus it’s senior year in December. I’m applying to schools that have the ACT and no subject test caveat such as Columbia,UPenn, Yale, Princeton etc…The problem is that I’m applying as an engineering applicant. Im strongly thinking about not sending my scores and focusing more on my essays. Do any of you guys know anyone who got into the aforementioned schools w/o subject tests as an engineering applicant?