I find Blount to be such a polarizing figure. He gets way too much blame when things aren't going well, and way too much credit when things are going well.
I think part of the reason is that he's a big back and it takes him a while to get up to speed, so he's more dependent on the OL than many other backs. If the OL isn't blocking, he gets swallowed up in the backfield consistently, and if the OL is blasting people off the line, he's running with a full head of steam and looking like a Pro Bowler. So his play is indicative of the team's overall play generally, although he's not necessarily the reason for it. Put another way, it's more about correlation than causation with him.
I really like him, I've defended him many times. But I really thought the OL did a great job in the run game too. He had a lot of big holes to run through. To his credit, he runs through them and once he's through, he's tough to bring down. He has good vision, and he usually drags people forward for a few extra "bonus" yards once he's up to full speed.