I think the AD was mostly correct. Rolex tends to favor larger (ie, higher volume) ADs over anyone else. They always get priority & for obvious reasons.
You are also correct that, relative to 5-10 years ago, today's reps are visually very close to their gen brothers.
It all depends on your goal. If you were trying to maintain a natural-looking patina, I think you overdid it. However, many here work very hard to produce that type of appearance.
I think you are probably overestimating the value of a properly made, blank 'Rolex' case, but mirroring what some have been saying for many years. Other than the dimensions, the only difference between the case used for a cheap Silex Sub & 1 of Phong's or MQ's cases is the money these aftermarket parts sellers charge.
As others have said, Phong is a hit-or-miss affair. Sometimes you get lucky, sometimes not. I would send the photos to him & ask for a replacement. He is usually cooperative when proven wrong.