I have a hard time with any measurement claiming Franklin is the best pass blocking RT would then say someone else is the best overall RT. Franklin is clearly a superior run blocker, so while he's come a long ways as a pass blocker and is getting a nice bump from Manning I just have a hard time putting faith in a metric that underrates his run blocking relative to his pass blocking skills.
Anyhow, Franklin's biggest problem at this point is Orlando Franklin. He's handled pretty much all of his match ups quite well this season, its the penalties that drag down his overall level of play. When he gets that under control he'll be an elite RT.