I'll chime in on the International thing since I fly to and fro every once in awhile to Thailand. I don't see GSP getting any direct to Asia flights until the fly time is significantly less. The flights options from Atl are limited enough as it is. Many of the itneraries that come up for Bangkok to GSP stop twice to get to GSP. This past July coming to GSP from Bangkok, we flew to Tiapei, LA, Chicago and then GSP. We've done Seoul to LA to Atl to GSP. I've also done Shianghi, LA, Atl, GSP. ThaiAir does Bangkok to New York, but it's hugely expensive (about twice the cost of stopping for a two hour break along the way).
For international stuff I think Europe (Germany, London, Paris) and perhaps Latin American destinations are more likely.
Seems to me that the focus would be better spent on getting lower cost regional travel and some longer leg direct flights. I'd love to see an LA to GSP or San Fran to GSP. Don't know that demand would justify it though.