If you watch Lopez on offense, a big thing you'll notice is he's always shoving somebody around. There were several plays last night where Aldridge or somebody else scored because Lopez was just flat out-muscling guys, jockying for position, screening underneath. Lopez somehow just gets more physically imposing every game.
Hickson was a good bench guy. But he's one of those players that you don't want to rely on as a starter. He's too small to play C, and his rebounding/hustle/no-defense game doesn't fit well playing next to most starting centers. I could see him doing well next to maybe one of the Gasols or Brook Lopez, but after that it gets hard to see.