I think SC can be on par with Michigan in the Big Ten. Wisconsin just has a ceiling they have never been able to break through and SC will be capable of winning the Big Ten any given year . Wisconsin doesn't have very much in-state talent and the closest area with decent talent (Chicagoland) is dominated by the Midwest’s big 3 of Notre Dame, OSU and Michigan. They do a great job getting corn-fed midwest lineman and lower rated skilled guys from Florida and Texas that fit their system, but SC can be so much more.
They don't know what they are going to do with the scheduling, but they are going to eliminate the divisions. If they really wanted to prop up SC they would have kept the divisions and put SC and UCLA in the west which would have put SC in the Big 10 title game most years. They didn't bring in SC and get that huge TV contract for SC vs. Rutgers or SC vs. Northwestern. SC playing at the Big House or Ohio State playing at the Coliseum are going to be the games of the week every time they happen.
Biggest concern I think for SC is the travel, in both the NFL and NCAA when west coast teams travel east the results have not been very good. Also the fact that CA produces very few quality offensive lineman, SC is going to be exposed if they can't recruit more quality players on the offensive and defensive lines. But I think Riley is a good coach.
People mention the weather, but I think it's overblown. Places like Madison and Ann Arbor are some of the most beautiful places in the country in September and October. November gets a bit more dicey, but SC/UCLA will probably be scheduled vs each other in the finale every year, so that leaves only a couple of November dates, and most November weekends in the midwest aren't going to result in snow.
It will be an adjustment though, going from the Pac-12 to the Big 10 is going to result in a significantly more difficult schedule yearly for SC. But still, it's SC they will be fine.