I am amazed at how many professional pilots out there clearly are so concerned about pilot's abilities that this fly-by has been totally blown out of proportion. I presume the flyby was carried out by one of the senior / training Captains and with the correct briefings etc. all carried out, and no doubt with a third person on the flight deck given the amount of training which is going on whenever a new fleet is introduced.
If we all have so little confidence in such a senior crew member descending on an ILS to 100' before flying along the runway and climbing away (at an airport he is totally familiar with having operated through on hundreds/thousands of sectors), then I think I'll take the bus in future.
No-one is suggesting that this becomes a routine manoeuvre for anyone anytime, but do you all really have so little confidence in your own abilities?