I think Brock is more than highly over rated and nobody who should have ever been considered for a Title Shot no matter the situation.
I would argue that they were lots of other Fights that should have been considered including maybe giving Randy an appropriate come back fight with somebody who eared their way there and Brock had not!
When Brock fought Frank Mir, Mir had lost 2 of his 4 previous fights so could well be considered as not at the top of his game by any measure.
When Brock fought Randy, again Randy had not fought in almost a year and half!
When Randy fought Tim Silvia, Randy would have been almost 2 year younger at the time which is huge at that age.
Tim Syliva is 1 year and 3 months older than Brock, making it a significant 3 year difference age for the better for Randy at the time.
Much less again fighting at the top level every year especially at 40 and beyond is substantial to say the least so Randy being 2 years older would be like 4 years for fighter 1 year at 30.
So in my view there is really no comparison.
I would consider Brock winning 66% of fights in the UFC poor to very poor and yes maybe even extremely poor and to be still be considered as part the "Best fighters In World" as Dana had said in no way accurate.
Generally would have no issue with his record if not for that and the significate "Hype".
Brock beat a poorly conditioned poor cardio Shane Carwin, who was also destroying Brock unitl he ran out of steam!
The minute Brock came across in shape capable Fighter in the likes of Cain Velasquez also in his prime he was devastated without question.
I think pictures speak for themselves!
Brock Lesnar is afraid of getting hit for "Real" and not a top level fighter by any means with grappling skill whatsoever.
He would fair no better against likes many other including Junior dos Santos, an in shape Shane Carwin along with others.