With regards to the upstate, Eastside loses the rest of the core of their awesome state championship team from last year, but the two top 3A teams will be Riverside and Greenville, and probably in that order. Let's not forget that Greenville has a strong junior class and will be good next year, Finotti or no Finotti.
Even though I think that Riverside got some luck on their side to get by Greenville this year, they have a very strong sophomore class which will be their core for the next two years.