for all of the Jones nuthuggers - if God didn't endow him with an 84' reach he would simply be a good fighter, not dominant. I could guarantee if he had a 76'-78' reach Cormier would destroy him.
JJ is no doubt very good - he uses his unusual structural gifts well. But without them he would be just a top-10 fighter vying for his round of shots at the title and maybe having the championship for a fight or two.
If I had to pick the most impressive 'fighting skills' between DC and JJ - I would pick DC every day of the year. That said I don't think DC will every beat JJ - but it's all due to JJ's body structure advantage, not his fighting skill (though JJ is certainly highly skilled). JJ holds a 12' reach advantage over DC - that's massive. And for two high-level guys it's pretty much an insurmountable obstacle. But that doesn't mean JJ has better fighting skills - it just means he can throw and land techniques from a distance that DC can't even come within 3 inches of landing a return strike. That's like an 18-yr old fighting a 13-yr old.
The pathetic thing in their first fight is that DC walked out of that fight totally unscarred. He certainly lost the fight - but for fighting a guy that has a 12' reach advantage on you and to walk away with zero marks was something that no one else but DC accomplished. Pretty amazing given that reach disadvantage.