Very strange how Boeing kicks out the autopilot when you press TOGA.
Except not always. Dual A/P approach will leave the A/P engaged once a few conditions are met.
What altitude did this go around commence? The last three airlines that I've worked for have taught that crews may elect to conduct an abandoned approach over the go around procedure where a missed approach is started from a high enough altitude. If conducted from near or below minimums, the full go around procedure is followed. As long as the airline permits the variation in procedure, I don't see a problem. In fact, it's letting us put our training to use and think like pilots again instead of the robotic thinking that some schools and airlines are attempting to create.
As a case in point, the last go around I conducted was due to stabilization criteria not being met. Rather than commanding for go around thrust at 1,000' AGL, we called "abandon approach" and pretty much did exactly what this pilot did. You're still protected in altitude by the approach, and the loss of another 150' feet while you reprogram the MCP doesn't impact flight safety when you still have 700 to 900' to go to minimums. Given we were also just over 1,000' from the missed approach altitude, I would argue that using the full go around procedure would have created more workload, not less. The go around I did before the one above (a year or so before) was an ATC instructed one from 150' AGL. In that case we followed the full procedure.
It makes me happy to see that other airlines and other pilots are still able to think and use the appropriate tools in the appropriate moment - assuming of course that the airline permits this variation in procedure. If not, then I have issues about the maintenance and adherence to SOP.