Had my first experience today. Checked a reservation and saw a change that made connection impossible. Original flights had all cleared GPUs. I ended up with a great 1k/Premier agent, but we had to spend a lot of time going flight by flight for my LAX-EWR segment looking for R inventory before finding an option, whereas before I just would have called with my selection. Not terrible since the agent was great, but he and I were both laughing at the experience.