It's like you never saw the man ever play a game. Zeke never got his longest runs until later in the game, once he got warmed up. In contrast, Pollard gives us instant results without having to get a bunch of carries to warm up. He's not a 30 carry a game RB but he doesn't need to be.
You have mischaracterized who Pollard is if you think he can't be elusive and speedy yet run with bruising power. Pollard already doesn't, you just have your head so far up Zeke's butt that you can't possibly appreciate what Pollard can do.