On the 2014 team, Parker and Hood probably did warrant heavy usage. However, Parker did not deserve 40% more usage than Hood. Think about that discrepancy (32% Parker vs. 23% Hood) and compare it to the hypothetical difference in potential efficiency, if they were given the same usage, between Parker and Hood. I'm not sure freshman Parker should have even been the first option over RS sophomore Hood.
Parker was great, but he wasn't LeBron (30% usage last season) compared to Hood's Channing Frye (19%) or something. K was letting Parker do whatever he wanted in that offense, and when the player is that good and the overall results are that good, you can get away with it.
I understand that higher usage leads to lower individual efficiency, and that younger players can't be expected to execute the highest level of offense. When you think along those lines, though, why would anyone believe an offense is best served with an 18-year-old taking on such a massive burden? The only OAD people would point to as a success story as a freshman who was given usage close to Parker's was Kevin Durant, and even Durant had lower usage than Parker (slightly). I can't rationalize giving any freshman a bigger role in the offense than Durant, but K did it.
Clearly, K was doing something right with that 2014 team, since they had the #1 offense in the country. I just wonder if they could have survived that first round game against the 14-seed if something had been done very differently, not just with the obviously terrible defense, but also with the elite offense that could have been significantly better still. One game doesn't tell the story, but Parker and Hood combined for 20 points on 24 shots and 5 assists to 7 turnovers against Mercer, while Quinn Cook had 23 points on 11 shots and 4 assists to 2 turnovers.
The 2014 offense is probably the hardest one to argue about being "ugly," since its results over the entire season were the best in the country. As for the other examples, I don't think I can ever be convinced that I should have enjoyed watching the Okafor offense, the Rivers offense or anything about the 2017 season, and the objective results were no better than what the usual top 2-5 talent level should be expected to produce.
To the question of which coach out there has run a smarter offense than K does these days, my personal answer is K in 2010. Offense driven by perimeter players who could all pass and shoot, and who all generally took good shots. Each of Nolan, Scheyer and Singler was between 23-24% usage. Bigs set picks, rolled to the rim, went for rebounds, finished around the rim. None of those guys have flourished in the NBA, yet K made it work so well on offense with that group. It wasn't the Warriors, but the basics were there - skilled perimeter players sharing possessions and minimizing turnovers, lots of PnR, bigs who focused on rebounds and layups, and close to zero post-ups. The irony is that 2010 took far fewer 3s than 2014, so K's greatest offensive creation - basically 2010 with more 3s - is still out there for him to achieve. The 2018 roster full of OADs who can't shoot is probably not the one to get there, unfortunately.
At the end of writing this post, I'm simply sad because it's not worth the effort to discuss Duke's defense to this same extent, since it's unrealistic for the defense to be good in any season now.