Pick..
You can listen to whoever you want. I don't think it's a fact that Al and Lopez have range beyond 15 ft. I also don't think it's a fact that Al, Zeller and Biyombo play together regularly but that certainly may have been impacted by Al's recent injury. Charlotte, during Al's injury, increased the tempo, which is the only choice they had and which has particularly benefited Walker.
It's also not a recipe for success to have two big, slow, low post players on the floor at the same time, particularly in today's game. Zach Lowe mentions that Houston went to Howard/Asik last year because they had nobody else to guard Aldridge, but that was only done in small doses. Also, Asik is a better defender than either Lopez or Al, so it was a particular matchup that Houston had to go to.