One thing I DO LIKE is integration with Interactive Brokers. Previously, and at Personal Capital, I had to manually update the account each time because I had to enter a secure code in response to a challenge. Interactive Brokers has the best security of any retail brokerage I've seen.
But IB does had the ability to provide permanent access tokens, and Fidelity now has support for that. Which is nice, but I still think I'll end up using PC more often. I just set up PC and it took literally 3 minutes, whereas Fidelity took like 30. This is most likely due to the background fetch capability at PC (it doesn't wait to fully import each account after I enter my credentials, it lets me keep doing stuff while it verifies everything in the background). Fidelity was painful because, not only did account verification halt forward progress, the fetch itself was extremely slow.
I know there's not much interest in this thread, but I'll just leave it for posterity. Call it my own personal review of this feature in case anyone googles it in the future.