Two disagreements:
(1) I get the whole thing about streamlining processing to the GA at a certain point. But booking onto a flight with positive inventory is a different story. I have never on another airline been told to see a GA to switch to positive inventory. Generally, GA's try to push that away.
(2) The T-60 should at least be adjusted to revised departure times. Based on that I was at T-120 and the GA was still assigned to a prior flight.