Randy was able to clinch, but he wasn't able to do much with it. DC may very well win from clinch work, but because of your bias against Lesnar you've likely missed the critical reason why.
Even Couture admitted Lesnar was very difficult to control in the clinch, so was unable to strike much. Watch the fight again - Lesnar was hitting him with some hard knees during the actual clinch, while all Couture could do was hold on. Most of Couture's clinch-strikes came when they were breaking the clinch - which is the more significant takeaway when using Lesnar/Couture to inform the DC/Lesnar fight. We saw DC use break-away strikes as a strategy against Miocic, and he admitted post-fight that it was something he trained based on watching Miocic's habit of leaving his free hand low when leaving the clinch.
Secondly you're forgetting a big elbow that briefly stunned Couture in round 2 IIRC, so I can't really rely on your assessment of Lesnar to inform anything.
