If Penn drops he will own the LW division. NOONE there can handle him. That being said Pulver V Penn for the LW title. then it is a mad dash to see who Penn beats on next.
Thing is Penn knows he will dominate that division so why bother. He loses focus when he doesnt think there is a challenge. Penn needs to stay at WW or move to MW. He will do fine where ever he goes and be a contender in whichever division he wants to fight in. Personally i would like to see him be the first to hold belts simultaneously in two divisions. LW, WW then challenge ACE. Course ace wins that one.