Switching to the 3-4 is just going to be a disaster for the Texans. Mario Williams can't be an effective 5-tech, and putting him inside wastes the majority of their pass-rush. Demeco Ryans if very iffy as an ILB; I don't see him being able to go head-on with a Guard. And where is their NT? The one bright spot is that they do have two guys who MIGHT be able to transition to OLB well: Brian Cushing and Connor Barwin. But when you can run them to death because of an undersized line, that hardly matters. 2011 Texans D=2010 Bills D, but without the decent secondary.