Those are details on which he works. He feels that they are correct from his understanding and whatever references he used. It's just perception most of the times. No matter how perfect someone wants to be there can be no perfect, something that should be commonly understandly to all humans.
Of course he would be applauded if it was made in 2 weeks but only until the update is released . The event will not look as good, majority details would have to be skipped, making it a completely flawed render and will in no means be satisfy to the player and the Dev. This project is very important to him and he has been vocal about it. Making such events without such settings and details will kill the artistic passion in him. He will no longer want to work on the project where he has lost interest and does not care anymore. Since he has to deliver renders that he is displeased with. If the creator is unhappy there is no way the players will enjoy it.
I think you completely missed the point of the post you are quoting:
The passion and drive and beauty and technique and skill and patience and persistence of L&P are not in doubt and do not go unappreciated.
That said, this was announced back in December (or even earlier?) as a small update. So if the Aiden event, projected to be (I forget, but maybe 25%?) of an announced
small update with a
90-day total production schedule, was completed in two weeks we'd all applaud the fact that for the first time in literally two years a scene was developed and completed way ahead of schedule. Instead we're on about week six I think, so that's about 40 days now, of a projected 90-day schedule, spent on (25%?) of the update. And remember, we have no photoshop or programming/translation for the Aiden scene either. Even if it's fast relative to creation it's still adding at least another week.
If I've got it all wrong and the Aiden event was supposed to be 50% of the update then so be it, I may be on about nothing.
All of it is necessary for the game to be what it is.
Correct: way behind schedule.