W Lacrosse
UCLA and USC don't bring much to the table as far as Northeastern sports such as Ice Hockey, Field Hockey and Lacrosse are concerned, but they do have one WLax program between them with USC. That elevates the number of participants to eight. Northwestern is the only other team that's not in the Eastern Time Zone, so that will be interesting.
The Pac 12 will maintain their auto bid by extending a lifeline to SDSU and UC Davis, which probably saves those two programs after Fresno and St Mary's (CA) recently dropped the sport.
USC and UCLA do bring a few west coast sports a little bit closer to Big Ten sponsorship. They both have a Beach Volleyball team, which triples the number of participating teams with Nebraska as the lone participant prior to their inclusion. They also provide a pair of Men's Volleyball programs, which doubles the number as OSU and PSU already have teams. They also have both men's and women's water polo. Michigan and Indiana have men's water polo iirc, so that number is doubled. Pretty sure those are the first two women's water polo programs though.
The rest of their sports are already Big Ten sponsored.