I read his book a few years back.
The first take away, as for so many, was really to reinforce the idea that the weakness in my game isn't really putting, as I'd always believed, but iron play (relatively). Even the greatest putters are just not making everything. When you read the stats and see that even the best in the world have to be inside 8 feet before they make 50% of their putts, it makes you feel a lot better about your own foibles on the green. But what makes those guys better is they just hit it close so often that they get way more chances than lesser players (and yes, they are fractionally better at putting as well).
As to the course thing, I was also very interested in his recommendations about aiming away from hazards. There's definitely a logic to it in tournament play. I mean, if I'm on the tee at the Road Hole, knowing I might only get to play the hole a handful of times in my life, the risk/reward for me says it is worth taking a bold line that challenges the OB down the right because that's the best way to make par. And I want to be able to say, "I made 4 on the Road Hole." And if I knock it OB and make 8 that's not a bad story, either! It's not a great story to say. "Oh, the Road Hole? I played conservatively out to the left, then short of the green, shipped on and two-putted." But if I'm playing in a tournament then that's absolutely the way to play the hole. There;'s the chance to make a 4, but mostly likely you'll make 5 and 7 is out of the equation. That's the goal in tournament golf.
But that's still a unique circumstance, a hole where playing well away from the severe hazard means likely bogey. Broadie shows that by and large on Tour (and for other players) playing away from the severe hazard generally doesn't carry that cost. Most pros can aim well away from OB or water and still expect to have a chance for birdie or par.
That would certainly make George Thomas ill to read, I would think. I suppose it's an accurate reflection of a lot of US golf courses, both based on architecture (not very strategic) and maintenance (pretty soft).