There's a ton of pros and cons. A lot of the weight comes from the thighs and quads. Evidently that's where the power of punches and kicks come in. Anderson just has pure technique.
Most superstar athletes have lean legs. There was a time in my life where I trained my vertical and I realized genes play a role. Arch of the foot, longer legs/calf means longer tendons which translates usually to more athleticism. Look at the b-ball players. Most MMA fighters are not extraordinary athletic although some are. Look at Roy, Matt Serra, Barnett, Pat, etc. Most are trained to become it vs born genetically gifted like the LHW title holder. His entire family are pro athletes.
I've seen people with skinny legs that can kick you and break you in half. The sound they make when they hit the shield pads is DEAFENING. Faster velocity. Jon Danaher and I suppose Ray were the evil geniuses behind the mishap. The breakage is a possibility (not planned), but it was definitely aimed to maim + deflect future leg attacks.
Then you have leg locks. I always said that the LHW title holder or anyone with lean legs should be very susceptible to leg submissions.
This is the beauty of the sport. There's PROS and CONS to every size. Think Stefan Struve has the advantage. Well, he should if he was like the Klitchkos. Hunt disproved the notion by getting on in the inside and breaking his jaw. Pat Barry has wicked leg kicks, but he's slow carrying all that weight around. Fighters with lean legs may be susceptible to injuries, but they have a higher velocity in kicks. Which does more damage. A foot long baton or a baseball bat.
Marcus Aurelius: Tell me again, Maximus, why are we here?
Maximus: For the glory of the Empire, sire.
Baked, not fried... the healthy choice.