I disagree that the existing unrestricted frequencies cannot be moved, and I'll quote Delta Air Lines' own words from its answer in the 2013 route case to support my view:
While you may be right about the intentions of the various airlines, I choose to discuss the more objective portions, like where AA/US could begin service as of October 1, 2014, and it looks to me like AA could begin service from ORD or PHL with the newly awarded CLT frequencies. And AA could begin service from the other city in March, 2015 with the frequencies owed by DL to US.
I don't pretend to know if AA/US will begin any new service in October or next March, but it looks to me like it could if Parker wanted to. So far, Parker has tipped his hand only on the MIA-GRU frequencies and JFK-GRU frequencies which it has applied to move to VCP. For all we know, Parker has yet to announce what AA will do with its October 1, 2014 CLT-GRU frequencies and what AA might do in March with the DTW-GRU frequencies owed by DL.