With a projected USC admit rate of only 9.75% this cycle, and with the recent trend that even 90% of all legacy applicants and circa 4K applicants with 4.0 unweighted GPAs and test scores in the 99th percentile among those not gaining admission, it is accurate to say that having a SCion or legacy connection will not aid an applicant much anymore.
There are just far too many applicants in total. This cycle, circa 81K applicants are competing for just around 7900 spots in terms of the amount they have stated that they will be admitting. Around 2400 were admitted EA, so that leaves just around 5500 or so to be admitted additionally this Friday. Overall, I suspect that this cycle will also see around 90% of all legacy applicants not gain admission. Many of those will be offered the Trojan Transfer Plan (TTP) however.