Yeah, K1 is different than MMA standup.
Pace, rhythm, the everpresent thread of a takedown or clinch.
Kaisermetal has it right, the padding is one serious part of the equation.
But then the KO being a front kick was bizarre.
Still doesn't mean he has not everything in his arsenal to beat Browne's and Bigfoot's ass.
But Reem has a problem: he has not an awesome coach like Browne.
And he needs to get his strategic holes fixed.
On first glance his style is simple as foolproof:
Stalk aggressivly, then either punch/kick with bad intentions, initiate clinch and apply knees from hell.
He was ok, later even very decent on the ground with an above average sprawl.
That made him pretty cool to watch. I was an Overeem fan since I saw him in 2H2H.
His style was rather wild back then: A haymakerin, clinchin pitbull.
Against serious, more refined contenders, that was his biggest minus. Lack of control.
Once they figured him out and weathered the wild clinch storm Alistair was losing.
K1 fighting remade him into Ubereem: he was now patient and powerful with great countering ability.
However the price was the slowly forward plodding Overeem we (again) saw vs Browne.
The new heavies are often light on their feet. Browne, the two champions, Todd "the white dreem " Duffee (whom Overeem beautifully destroyed btw his best MMA Ubereem performance), Mittrione etc
Against these,Thai/K1 footwork @ ~270lbs is often at a stylistic disadvantage in MMA.
Squirly MMA tactics and setups can make it very hard to land these spectacular counterhooks of his.
Overeem, too, felt this way, so he experimented with styles.
During most of his fights, he employed an extremely low stance while being the aggressor. Good vs takedowns and for initiating the clinch, A.'s bread and butter move. However, once on the defense, he falls apart.
His Ubereem tranformation modified this style into what we saw in his last Japan bouts. Great if the other one is coming for you (Duffee). Not so great if the opponent won't come out to play (Werdum).
Versus Bigfoot, used the "lean back to go out" style. Clearly, he tried to exert more control of the fight with more fluidity of the feet.
Versus Browne, he reused his default Ubereem thai stance.
That is not just simple gameplanning. That's quite a difference between two fights.
Now throw in Alistair's tendency to blow his wad too soon and you have a recipe for underachieving.
Greg Jackson, halp!