I think Lynell Willingham is a bit of an idiot personally. I also don't think the two moves they made were really because of anything Coleman did or did not do. They traded for a top 5 LT. You do that no matter what if you can, unless you have a top 5 LT. They drafted Conerly, who they thought was the best player available when they drafted. And he's a first round vs. third round talent. And then they tried desperately for Coleman to take over the LG spot, he even started 2 games there.
So, I don't really think they turned over every rock to replace him. Some poster, I can't remember who, thinks Lynell is worse than Chris Russell. I don't know about all that. But he seems to be somewhat of an overreacting shock jock type of dude.