Why do you doubt moving sectors back to LACC would never happen? Is that management or staff resistance? Given the state of flux down here at the moment (iFacts, training colleges, CTC, TC moving) I'm sure more sectors could be accommodated if 1) the decision were made soon enough and 2) there is a compelling reason to do it.
Or to put it another way, do we need to rethink where we are going to perform all the ACC tasks (including training) before we start building new sites or refurbishing old ones?