KO was not the same KO that we know today, he was above average at best because he was hurt all the time, so Urschel is comparable. Jensen is an average center but it should work out. Worse comes to worst, put Jensen at G and Urschel at C.
The leadership will never be at that level, but Weddle and Suggs are doing a pretty darn good job in my opinion. The addition of Jefferson will also boost the confidence and swagger of the secondary. CJ is another up-and-coming guy after he takes Correa under his wing. My gut feeling also tells me that Dumervil returns. Flacco, Yanda and a grown-up Wallace will take on the leadership roles on the offensive side of the ball.
Urschel comparable to KO??? Do you really believe that?