First, the seat position will move due to sag when he sits on the bike. You don't know how much, so your calculations already have an element of uncertainty in them that you can't account for.
Bike unbalanced in travel? Yeah, it is, but many bikes in the 90s got by with more rear travel than front. Just the way technology went.
The only way you can make these judgments is by measuring the bike in person. Even the effects of the angle of the photo on measurements can throw off measurements on the monitor.
Considering the time and expense that has gone into this bike, it's probable that the rider knows if it's the correct size or not.
Maybe some of your comments seem different to the reader than you meant, but if it was MY bike you were writing these unfounded conclusions and personal insults about, you wouldn't find me very receptive to your ideas.
